{"id":98124,"date":"2026-08-31T07:26:27","date_gmt":"2026-08-30T23:26:27","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/98124.html"},"modified":"2026-08-31T07:26:27","modified_gmt":"2026-08-30T23:26:27","slug":"asp-net-core-%e5%86%85%e5%ad%98%e6%b3%84%e6%bc%8f%e4%b8%8e-gc-%e6%8e%92%e9%9a%9c%e5%ae%9e%e5%bd%95%ef%bc%9a%e4%bb%8e%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%8f%88%e6%8c%82%e4%ba%86%e5%88%b0","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/98124.html","title":{"rendered":"ASP.NET Core \u5185\u5b58\u6cc4\u6f0f\u4e0e GC \u6392\u969c\u5b9e\u5f55\uff1a\u4ece\u201c\u670d\u52a1\u5668\u53c8\u6302\u4e86\u201c\u5230\u6839\u56e0\u5b9a\u4f4d"},"content":{"rendered":"<p>\u4f60\u662f\u5426\u7ecf\u5386\u8fc7\u8fd9\u6837\u7684\u6df1\u591c\u544a\u8b66&#xff1a;\u670d\u52a1\u521a\u4e0a\u7ebf\u65f6\u5185\u5b58\u5360\u7528 200MB&#xff0c;\u4e09\u5929\u540e\u6da8\u5230 2GB&#xff0c;\u4e00\u5468\u540e OOM \u88ab Kubernetes \u6740\u6389\u91cd\u542f&#xff1f;\u65e5\u5fd7\u91cc\u6ca1\u6709\u4efb\u4f55 Exception&#xff0c;\u53ea\u6709\u4e00\u884c\u51b0\u51b7\u7684 Killed process 1234 (dotnet) total-vm:3245678kB\u3002<\/p>\n<p>\u5185\u5b58\u95ee\u9898\u662f .NET \u7ebf\u4e0a\u6392\u969c\u4e2d\u6700\u9690\u853d\u3001\u6700\u8003\u9a8c\u57fa\u672c\u529f\u7684\u4e00\u7c7b\u3002GC \u5e2e\u4f60\u7ba1\u7406\u4e86\u5185\u5b58&#xff0c;\u4f46\u5e76\u6ca1\u6709\u5e2e\u4f60\u6d88\u9664\u5185\u5b58\u6cc4\u6f0f\u3002\u6258\u7ba1\u4e16\u754c\u91cc\u7684\u6cc4\u6f0f\u5f80\u5f80\u4e0d\u662f&#034;\u5fd8\u8bb0 free&#034;&#xff0c;\u800c\u662f&#034;\u5fd8\u8bb0\u89e3\u9664\u5f15\u7528&#034;\u2014\u2014\u4e00\u6761\u770b\u4e0d\u89c1\u7684\u5f15\u7528\u94fe&#xff0c;\u8ba9 GC \u4ee5\u4e3a\u5bf9\u8c61\u8fd8\u6d3b\u7740\u3002<\/p>\n<p>\u672c\u6587\u7528\u4e09\u4e2a\u771f\u5b9e\u6848\u4f8b&#xff0c;\u5b8c\u6574\u8bb0\u5f55\u4ece\u73b0\u8c61\u53d1\u73b0\u3001\u6307\u6807\u89c2\u6d4b\u3001Dump \u6293\u53d6\u5230\u6839\u56e0\u5b9a\u4f4d\u7684\u5168\u8fc7\u7a0b\u3002\u6240\u6709\u6848\u4f8b\u5747\u6765\u81ea\u8239\u8236\u7ba1\u7406\u7cfb\u7edf&#xff08;PMS&#xff09;\u751f\u4ea7\u73af\u5883&#xff0c;\u5df2\u505a\u8131\u654f\u5904\u7406\u3002<\/p>\n<hr \/>\n<h3>\u4e00\u3001\u5148\u641e\u6e05\u695a&#xff1a;.NET \u91cc\u7684&#034;\u5185\u5b58&#034;\u5230\u5e95\u6307\u4ec0\u4e48<\/h3>\n<p>\u5728\u6392\u969c\u4e4b\u524d&#xff0c;\u6211\u4eec\u5fc5\u987b\u533a\u5206\u51e0\u4e2a\u5bb9\u6613\u6df7\u6dc6\u7684\u6982\u5ff5\u3002\u5f88\u591a\u4eba\u4e00\u770b\u5230\u5185\u5b58\u9ad8\u5c31\u558a&#034;\u5185\u5b58\u6cc4\u6f0f&#034;&#xff0c;\u4f46\u5185\u5b58\u9ad8 \u2260 \u6cc4\u6f0f\u3002<\/p>\n<h4>1.1 \u4e09\u5c42\u5185\u5b58\u6a21\u578b<\/h4>\n<p>\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510<br \/>\n\u2502           \u8fdb\u7a0b\u5de5\u4f5c\u96c6 (Working Set)         \u2502<br \/>\n\u2502  \u64cd\u4f5c\u7cfb\u7edf\u770b\u5230\u7684\u7269\u7406\u5185\u5b58\u5360\u7528                  \u2502<br \/>\n\u2502  \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510 \u2502<br \/>\n\u2502  \u2502       .NET \u6258\u7ba1\u5806 (Managed Heap)      \u2502 \u2502<br \/>\n\u2502  \u2502  GC \u7ba1\u7406\u7684\u5185\u5b58&#xff0c;\u542b Gen0\/Gen1\/Gen2\/LOH  \u2502 \u2502<br \/>\n\u2502  \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2502<br \/>\n\u2502  \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510 \u2502<br \/>\n\u2502  \u2502       \u975e\u6258\u7ba1\u5185\u5b58 (Native Heap)        \u2502 \u2502<br \/>\n\u2502  \u2502  P\/Invoke\u3001\u6587\u4ef6\u53e5\u67c4\u3001Socket\u7f13\u51b2\u533a\u3001    \u2502 \u2502<br \/>\n\u2502  \u2502  \u7b2c\u4e09\u65b9\u539f\u751f\u5e93&#xff08;\u5982 SQLite\u3001\u56fe\u50cf\u5e93&#xff09;      \u2502 \u2502<br \/>\n\u2502  \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2502<br \/>\n\u2502  \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510 \u2502<br \/>\n\u2502  \u2502           \u7ebf\u7a0b\u6808 &#043; JIT \u4ee3\u7801\u7f13\u5b58        \u2502 \u2502<br \/>\n\u2502  \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2502<br \/>\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/p>\n<p>\u5173\u952e\u8ba4\u77e5&#xff1a;<\/p>\n<ul>\n<li>\u6258\u7ba1\u5185\u5b58\u9ad8&#xff1a;\u53ef\u80fd\u662f\u6b63\u5e38\u7684\u5185\u5b58\u7f13\u5b58\u3001Gen2 \u5806\u79ef&#xff0c;\u4e5f\u53ef\u80fd\u662f\u6cc4\u6f0f<\/li>\n<li>\u975e\u6258\u7ba1\u5185\u5b58\u9ad8&#xff1a;\u5e38\u89c1\u4e8e\u672a Dispose \u7684 SafeHandle\u3001\u539f\u751f\u5e93\u6cc4\u6f0f\u3001GCHandle.Alloc \u672a\u91ca\u653e<\/li>\n<li>\u5de5\u4f5c\u96c6\u9ad8\u4f46\u6258\u7ba1\u5806\u4f4e&#xff1a;\u95ee\u9898\u5728\u975e\u6258\u7ba1\u5c42&#xff0c;\u7528 dotnet-counters \u4e00\u770b\u4fbf\u77e5<\/li>\n<\/ul>\n<h4>1.2 GC \u4ee3\u9f84\u673a\u5236\u901f\u89c8<\/h4>\n<p>Gen0 (\u5c0f\u5bf9\u8c61&#xff0c;\u77ed\u671f) \u2500\u2500\u56de\u6536\u2500\u2500\u2192 \u5b58\u6d3b\u664b\u5347 \u2500\u2500\u2192 Gen1<br \/>\nGen1 (\u7f13\u51b2\u533a)        \u2500\u2500\u56de\u6536\u2500\u2500\u2192 \u5b58\u6d3b\u664b\u5347 \u2500\u2500\u2192 Gen2<br \/>\nGen2 (\u957f\u751f\u547d\u5468\u671f)     \u2500\u2500\u56de\u6536\u2500\u2500\u2192 \u5168GC&#xff0c;\u4ee3\u4ef7\u6700\u5927<br \/>\nLOH (\u226585,000\u5b57\u8282)    \u2500\u2500\u4e0d\u538b\u7f29\u2500\u2500\u2192 \u4e0eGen2\u4e00\u8d77\u56de\u6536&#xff0c;\u6613\u4ea7\u751f\u788e\u7247<\/p>\n<table>\n<tr>\u4ee3\u9f84\u56de\u6536\u9891\u7387\u5355\u6b21\u8017\u65f6\u5178\u578b\u5bf9\u8c61<\/tr>\n<tbody>\n<tr>\n<td>Gen0<\/td>\n<td>\u9ad8\u9891&#xff08;\u6bcf\u51e0\u79d2&#xff09;<\/td>\n<td>&lt;1ms<\/td>\n<td>\u5c40\u90e8\u53d8\u91cf\u3001\u4e34\u65f6LINQ\u7ed3\u679c<\/td>\n<\/tr>\n<tr>\n<td>Gen1<\/td>\n<td>\u4e2d\u9891<\/td>\n<td>1-5ms<\/td>\n<td>\u8bf7\u6c42\u4f5c\u7528\u57df\u670d\u52a1\u3001\u77ed\u751f\u547d\u5468\u671fDTO<\/td>\n<\/tr>\n<tr>\n<td>Gen2<\/td>\n<td>\u4f4e\u9891&#xff08;\u4f46\u53ef\u80fd\u9891\u7e41\u89e6\u53d1&#xff09;<\/td>\n<td>10-100ms&#043;<\/td>\n<td>\u5355\u4f8b\u670d\u52a1\u3001\u7f13\u5b58\u3001\u9759\u6001\u5217\u8868<\/td>\n<\/tr>\n<tr>\n<td>LOH<\/td>\n<td>\u968fGen2<\/td>\n<td>\u788e\u7247\u76f8\u5173<\/td>\n<td>\u5927\u6570\u7ec4\u3001\u5927\u5b57\u7b26\u4e32\u3001Memory<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&#x1f4ac; \u4e92\u52a8\u4e00\u4e0b&#xff1a; \u4f60\u7684\u670d\u52a1\u6709\u6ca1\u6709\u9047\u5230\u8fc7 Gen2 GC \u9891\u7387\u7a81\u7136\u5347\u9ad8\u4f46 CPU \u4e0d\u9ad8\u7684\u60c5\u51b5&#xff1f;\u60f3\u60f3\u770b&#xff0c;\u4ec0\u4e48\u64cd\u4f5c\u4f1a\u8ba9\u5927\u91cf\u5bf9\u8c61\u610f\u5916\u8fdb\u5165 Gen2&#xff1f;<\/p>\n<hr \/>\n<h3>\u4e8c\u3001\u8bca\u65ad\u5de5\u5177\u94fe&#xff1a;\u4ece&#034;\u8089\u773c\u770b&#034;\u5230&#034;\u7cbe\u51c6\u5b9a\u4f4d&#034;<\/h3>\n<p>\u5de5\u6b32\u5584\u5176\u4e8b&#xff0c;\u5fc5\u5148\u5229\u5176\u5668\u3002.NET \u63d0\u4f9b\u4e86\u4e00\u5957\u5f3a\u5927\u7684\u8bca\u65ad\u5de5\u5177&#xff0c;\u5168\u90e8\u662f\u8de8\u5e73\u53f0\u547d\u4ee4\u884c\u5de5\u5177&#xff0c;\u5728 Linux \u5bb9\u5668\u91cc\u4e5f\u80fd\u7528\u3002<\/p>\n<h4>2.1 dotnet-counters&#xff1a;\u5b9e\u65f6\u6307\u6807\u89c2\u6d4b<\/h4>\n<p>\u5b89\u88c5&#xff1a;<\/p>\n<p>dotnet tool <span class=\"token function\">install<\/span> <span class=\"token parameter variable\">&#8211;global<\/span> dotnet-counters<\/p>\n<p>\u89c2\u6d4b\u6838\u5fc3\u6307\u6807&#xff1a;<\/p>\n<p><span class=\"token comment\"># \u67e5\u770b\u6240\u6709 .NET \u8fdb\u7a0b<\/span><br \/>\ndotnet-counters <span class=\"token function\">ps<\/span><\/p>\n<p><span class=\"token comment\"># \u5b9e\u65f6\u76d1\u63a7 GC \u548c\u7ebf\u7a0b\u6c60\u6307\u6807<\/span><br \/>\ndotnet-counters monitor <span class=\"token parameter variable\">-p<\/span> <span class=\"token operator\">&lt;<\/span>PID<span class=\"token operator\">&gt;<\/span> <span class=\"token punctuation\">\\\\<\/span><br \/>\n  System.Runtime <span class=\"token punctuation\">\\\\<\/span><br \/>\n  Microsoft.AspNetCore.Hosting<\/p>\n<p><span class=\"token comment\"># \u91cd\u70b9\u5173\u6ce8\u8fd9\u4e9b\u6307\u6807&#xff1a;<\/span><br \/>\n<span class=\"token comment\"># gc-heap-size              \u2014 \u6258\u7ba1\u5806\u603b\u5927\u5c0f<\/span><br \/>\n<span class=\"token comment\"># gen-0-gc-count \/ gen-1-gc-count \/ gen-2-gc-count<\/span><br \/>\n<span class=\"token comment\"># gen-2-size \/ loh-size     \u2014 Gen2 \u548c LOH \u5927\u5c0f<\/span><br \/>\n<span class=\"token comment\"># time-in-gc                \u2014 GC \u65f6\u95f4\u5360\u6bd4&#xff08;\u5065\u5eb7\u503c &lt; 5%&#xff09;<\/span><br \/>\n<span class=\"token comment\"># threadpool-thread-count \/ threadpool-queue-length<\/span><br \/>\n<span class=\"token comment\"># working-set               \u2014 \u8fdb\u7a0b\u5de5\u4f5c\u96c6<\/span><br \/>\n<span class=\"token comment\"># alloc-rate                \u2014 \u5206\u914d\u901f\u7387&#xff08;MB\/\u79d2&#xff09;<\/span><\/p>\n<p>\u5224\u8bfb\u7ecf\u9a8c&#xff1a;<\/p>\n<table>\n<tr>\u73b0\u8c61\u53ef\u80fd\u539f\u56e0<\/tr>\n<tbody>\n<tr>\n<td>gen-2-size \u6301\u7eed\u589e\u957f\u4e0d\u4e0b\u964d<\/td>\n<td>Gen2 \u5185\u5b58\u6cc4\u6f0f<\/td>\n<\/tr>\n<tr>\n<td>loh-size \u6301\u7eed\u589e\u957f<\/td>\n<td>\u5927\u5bf9\u8c61\u6cc4\u6f0f\u6216\u788e\u7247<\/td>\n<\/tr>\n<tr>\n<td>time-in-gc &gt; 20%<\/td>\n<td>GC \u538b\u529b\u8fc7\u5927&#xff0c;\u5206\u914d\u901f\u7387\u8fc7\u9ad8<\/td>\n<\/tr>\n<tr>\n<td>working-set \u9ad8\u4f46 gc-heap-size \u4f4e<\/td>\n<td>\u975e\u6258\u7ba1\u5185\u5b58\u6cc4\u6f0f<\/td>\n<\/tr>\n<tr>\n<td>alloc-rate &gt; 100MB\/s<\/td>\n<td>\u4ee3\u7801\u4e2d\u6709\u9ad8\u9891\u5927\u5bf9\u8c61\u5206\u914d<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>2.2 dotnet-dump&#xff1a;\u6293\u53d6\u548c\u5206\u6790\u5185\u5b58\u8f6c\u50a8<\/h4>\n<p><span class=\"token comment\"># \u5b89\u88c5<\/span><br \/>\ndotnet tool <span class=\"token function\">install<\/span> <span class=\"token parameter variable\">&#8211;global<\/span> dotnet-dump<\/p>\n<p><span class=\"token comment\"># \u6293\u53d6 Dump&#xff08;Linux \u5bb9\u5668\u5185\u9700\u8981 SYS_PTRACE \u6743\u9650&#xff09;<\/span><br \/>\ndotnet-dump collect <span class=\"token parameter variable\">-p<\/span> <span class=\"token operator\">&lt;<\/span>PID<span class=\"token operator\">&gt;<\/span> <span class=\"token parameter variable\">&#8211;type<\/span> Full <span class=\"token parameter variable\">-o<\/span> \/tmp\/crash.dmp<\/p>\n<p><span class=\"token comment\"># \u5206\u6790 Dump<\/span><br \/>\ndotnet-dump analyze \/tmp\/crash.dmp<\/p>\n<p>\u8fdb\u5165\u4ea4\u4e92\u5f0f\u5206\u6790\u540e&#xff0c;\u6700\u5e38\u7528\u7684\u547d\u4ee4&#xff1a;<\/p>\n<p>&gt; eeheap -gc                    # \u67e5\u770b\u5404\u4ee3\u5806\u5927\u5c0f\u548c\u6bb5\u4fe1\u606f<br \/>\n&gt; dumpheap -stat                # \u7edf\u8ba1\u6258\u7ba1\u5806\u4e0a\u6240\u6709\u7c7b\u578b\u7684\u5bf9\u8c61\u6570\u91cf\u548c\u603b\u5927\u5c0f<br \/>\n&gt; dumpheap -mt &lt;MT&gt;             # \u5217\u51fa\u67d0\u7c7b\u578b\u7684\u6240\u6709\u5bf9\u8c61<br \/>\n&gt; gcroot &lt;address&gt;              # \u67e5\u627e\u5bf9\u8c61\u7684\u5f15\u7528\u6839&#xff08;\u6700\u5173\u952e\u7684\u547d\u4ee4&#xff01;&#xff09;<br \/>\n&gt; dumpobj &lt;address&gt;             # \u67e5\u770b\u5bf9\u8c61\u8be6\u60c5<br \/>\n&gt; clrthreads                    # \u67e5\u770b\u6240\u6709\u6258\u7ba1\u7ebf\u7a0b<br \/>\n&gt; threadpool                    # \u67e5\u770b\u7ebf\u7a0b\u6c60\u72b6\u6001<br \/>\n&gt; finalizequeue                 # \u67e5\u770b\u7ec8\u7ed3\u5316\u961f\u5217&#xff08;\u6392\u67e5\u975e\u6258\u7ba1\u6cc4\u6f0f&#xff09;<br \/>\n&gt; gchandles                     # \u67e5\u770b GCHandle&#xff08;\u6392\u67e5 Pinned \u5bf9\u8c61\u6cc4\u6f0f&#xff09;<\/p>\n<h4>2.3 dotnet-trace&#xff1a;\u6027\u80fd\u8ffd\u8e2a<\/h4>\n<p><span class=\"token comment\"># \u6293\u53d6 CPU \u91c7\u6837\u8ffd\u8e2a&#xff08;30\u79d2&#xff09;<\/span><br \/>\ndotnet-trace collect <span class=\"token parameter variable\">-p<\/span> <span class=\"token operator\">&lt;<\/span>PID<span class=\"token operator\">&gt;<\/span> <span class=\"token parameter variable\">&#8211;profile<\/span> cpu-sampling <span class=\"token parameter variable\">&#8211;duration<\/span> 00:00:30<\/p>\n<p><span class=\"token comment\"># \u6293\u53d6 GC \u8be6\u7ec6\u4e8b\u4ef6<\/span><br \/>\ndotnet-trace collect <span class=\"token parameter variable\">-p<\/span> <span class=\"token operator\">&lt;<\/span>PID<span class=\"token operator\">&gt;<\/span> <span class=\"token punctuation\">\\\\<\/span><br \/>\n  <span class=\"token parameter variable\">&#8211;providers<\/span> Microsoft-Windows-DotNETRuntime:4:4 <span class=\"token punctuation\">\\\\<\/span><br \/>\n  <span class=\"token parameter variable\">&#8211;duration<\/span> 00:00:30<\/p>\n<p>\u91c7\u96c6\u7684 .nettrace \u6587\u4ef6\u53ef\u4ee5\u7528 PerfView \u6216 Visual Studio \u6253\u5f00&#xff0c;\u770b\u5230\u6bcf\u4e00\u6b21 GC \u7684\u89e6\u53d1\u539f\u56e0\u3001\u6682\u505c\u65f6\u95f4\u548c\u5404\u4ee3\u5927\u5c0f\u53d8\u5316\u3002<\/p>\n<h4>2.4 \u751f\u4ea7\u73af\u5883\u5feb\u901f\u6293\u53d6\u811a\u672c<\/h4>\n<p>\u5728 Kubernetes Pod \u4e2d\u6293\u53d6 Dump \u7684\u5b8c\u6574\u6d41\u7a0b&#xff1a;<\/p>\n<p># \u5728 Dockerfile \u4e2d\u9884\u88c5\u8bca\u65ad\u5de5\u5177<br \/>\nFROM mcr.microsoft.com\/dotnet\/aspnet:8.0 AS base<br \/>\nRUN apt-get update &amp;&amp; apt-get install -y curl &amp;&amp; \\\\<br \/>\n    curl -sSL https:\/\/dot.net\/v1\/dotnet-install.sh | bash \/dev\/stdin &#8211;tool-path \/tools &amp;&amp; \\\\<br \/>\n    \/tools\/dotnet tool install &#8211;global dotnet-counters &#8211;tool-path \/tools &amp;&amp; \\\\<br \/>\n    \/tools\/dotnet tool install &#8211;global dotnet-dump &#8211;tool-path \/tools<br \/>\nENV PATH&#061;&#034;${PATH}:\/tools&#034;<\/p>\n<p><span class=\"token comment\"># \u8fdb\u5165 Pod<\/span><br \/>\nkubectl <span class=\"token builtin class-name\">exec<\/span> <span class=\"token parameter variable\">-it<\/span> pms-api-7d8f9c6b5-x2k4n &#8212; <span class=\"token function\">bash<\/span><\/p>\n<p><span class=\"token comment\"># \u627e\u5230\u8fdb\u7a0b<\/span><br \/>\ndotnet-counters <span class=\"token function\">ps<\/span><\/p>\n<p><span class=\"token comment\"># \u76d1\u63a7\u786e\u8ba4\u95ee\u9898<\/span><br \/>\ndotnet-counters monitor <span class=\"token parameter variable\">-p<\/span> <span class=\"token number\">1<\/span> <span class=\"token parameter variable\">&#8211;counters<\/span> System.Runtime<\/p>\n<p><span class=\"token comment\"># \u53e6\u4e00\u4e2a\u7ec8\u7aef\u6293\u53d6 Dump<\/span><br \/>\ndotnet-dump collect <span class=\"token parameter variable\">-p<\/span> <span class=\"token number\">1<\/span> <span class=\"token parameter variable\">&#8211;type<\/span> Full <span class=\"token parameter variable\">-o<\/span> \/tmp\/memory_<span class=\"token variable\"><span class=\"token variable\">$(<\/span><span class=\"token function\">date<\/span> &#043;%Y%m%d_%H%M%S<span class=\"token variable\">)<\/span><\/span>.dmp<\/p>\n<p><span class=\"token comment\"># \u62f7\u8d1d\u5230\u672c\u5730\u5206\u6790<\/span><br \/>\nkubectl <span class=\"token function\">cp<\/span> pms-api-7d8f9c6b5-x2k4n:\/tmp\/memory_20260824_030000.dmp .\/memory.dmp<\/p>\n<p>&#x1f4ac; \u4e92\u52a8\u4e00\u4e0b&#xff1a; \u5982\u679c\u4f60\u7684 Pod \u6ca1\u6709\u5b89\u88c5 dotnet-dump&#xff0c;\u4e14\u751f\u4ea7\u73af\u5883\u4e0d\u80fd\u968f\u610f\u6539\u955c\u50cf&#xff0c;\u4f60\u4f1a\u600e\u4e48\u5728\u4e0d\u91cd\u542f\u8fdb\u7a0b\u7684\u60c5\u51b5\u4e0b\u6293\u53d6\u5185\u5b58 Dump&#xff1f;&#xff08;\u63d0\u793a&#xff1a;\u8003\u8651 gcore \u6216 \/proc\/&lt;pid&gt;\/mem \u7684\u65b9\u6848\u3002&#xff09;<\/p>\n<hr \/>\n<h3>\u4e09\u3001\u6848\u4f8b\u4e00&#xff1a;\u4e8b\u4ef6\u8ba2\u9605\u672a\u89e3\u7ed1\u2014\u2014\u9759\u6001\u4e8b\u4ef6\u7684&#034;\u951a\u5b9a\u6548\u5e94&#034;<\/h3>\n<h4>3.1 \u73b0\u8c61<\/h4>\n<p>PMS \u7cfb\u7edf\u7684\u8239\u5cb8\u540c\u6b65\u670d\u52a1\u5728\u5cb8\u7aef\u90e8\u7f72&#xff0c;\u8d1f\u8d23\u63a5\u6536\u8239\u8236\u7aef\u901a\u8fc7\u536b\u661f\u94fe\u8def\u4e0a\u62a5\u7684\u6570\u636e\u3002\u4e0a\u7ebf\u4e24\u5468\u540e&#xff0c;\u8fd0\u7ef4\u53d1\u73b0 Pod \u5185\u5b58\u4ece 300MB \u7a33\u6b65\u589e\u957f\u5230 1.8GB&#xff0c;\u7136\u540e OOMKilled\u3002\u91cd\u542f\u540e\u6062\u590d&#xff0c;\u4f46\u589e\u957f\u66f2\u7ebf\u5982\u65f6\u949f\u822c\u7cbe\u786e\u3002<\/p>\n<p>\u5185\u5b58\u53d8\u5316&#xff1a;<br \/>\nDay 0  \u2500\u2500\u2500 312MB  &#xff08;\u90e8\u7f72\u540e\u521d\u59cb\u503c&#xff09;<br \/>\nDay 2  \u2500\u2500\u2500 580MB<br \/>\nDay 5  \u2500\u2500\u2500 1.1GB<br \/>\nDay 8  \u2500\u2500\u2500 1.5GB<br \/>\nDay 10 \u2500\u2500\u2500 1.8GB  \u26a0\ufe0f \u63a5\u8fd1 limit 2GB<br \/>\nDay 11 \u2500\u2500\u2500 OOMKilled, \u91cd\u542f<\/p>\n<p>\u7528 dotnet-counters \u89c2\u6d4b&#xff1a;<\/p>\n<p>gen-2-size:        1,456 MB    \u2190 \u5f02\u5e38&#xff01;<br \/>\nloh-size:            128 MB<br \/>\ntime-in-gc:           8.2%<br \/>\nworking-set:       1,812 MB<br \/>\ngc-heap-size:      1,590 MB    \u2190 \u4e3b\u8981\u95ee\u9898\u5728\u6258\u7ba1\u5806<\/p>\n<p>Gen2 \u6301\u7eed\u589e\u957f&#xff0c;\u8bf4\u660e\u6709\u957f\u751f\u547d\u5468\u671f\u5bf9\u8c61\u4e0d\u65ad\u88ab&#034;\u951a\u5b9a&#034;\u5728 Gen2 \u4e0a&#xff0c;GC \u65e0\u6cd5\u56de\u6536\u3002<\/p>\n<h4>3.2 \u5b9a\u4f4d<\/h4>\n<p>\u6293\u53d6 Dump \u540e\u5206\u6790&#xff1a;<\/p>\n<p>&gt; dumpheap -stat<\/p>\n<p>Statistics:<br \/>\n    MT     Count    TotalSize  Class Name<br \/>\n00007f&#8230;  85432   683,456,000  Pms.Sync.Models.ShipDataPackage<br \/>\n00007f&#8230;  85432   204,936,800  Pms.Sync.Handlers.SyncEventHandler<br \/>\n00007f&#8230;  85431   102,517,200  Pms.Sync.Models.SyncContext<br \/>\n00007f&#8230;     12       576,000  System.Collections.Generic.List&lt;Object&gt;<br \/>\n&#8230;<\/p>\n<p>85,432 \u4e2a ShipDataPackage \u5bf9\u8c61&#xff01; \u8fd9\u662f\u6bcf\u6b21\u540c\u6b65\u8bf7\u6c42\u7684\u6570\u636e\u5305&#xff0c;\u6b63\u5e38\u60c5\u51b5\u4e0b\u8bf7\u6c42\u7ed3\u675f\u540e\u5c31\u5e94\u8be5\u88ab\u56de\u6536\u3002\u8ba9\u6211\u627e\u4e00\u4e2a\u5bf9\u8c61\u770b\u770b\u8c01\u5728\u5f15\u7528\u5b83&#xff1a;<\/p>\n<p>&gt; dumpheap -mt 00007f&#8230;<br \/>\n    Address       MT           Size<br \/>\n000001a2b3c4d5e  00007f&#8230;    8000<br \/>\n&#8230;<\/p>\n<p>&gt; gcroot 000001a2b3c4d5e<\/p>\n<p>Thread 1234:<br \/>\n-&gt; 000001a1b2c3d4e5   Pms.Sync.Eventing.SyncEventBroker   (\u9759\u6001\u5b57\u6bb5)<br \/>\n-&gt; 000001a1b2c3d4f0   System.Collections.Generic.List&lt;SyncEventHandler&gt;<br \/>\n-&gt; 000001a2b3c3d4e0   Pms.Sync.Handlers.SyncEventHandler<br \/>\n-&gt; 000001a2b3c4d5e0   Pms.Sync.Models.ShipDataPackage<\/p>\n<p>\u6839\u56e0\u627e\u5230\u4e86&#xff01; \u5f15\u7528\u94fe\u662f&#xff1a;<\/p>\n<p>\u9759\u6001 SyncEventBroker<br \/>\n  \u2192 List&lt;SyncEventHandler&gt;  (\u4e8b\u4ef6\u8ba2\u9605\u8005\u5217\u8868)<br \/>\n    \u2192 SyncEventHandler      (\u6bcf\u6b21\u8bf7\u6c42\u521b\u5efa\u7684\u5904\u7406\u5668)<br \/>\n      \u2192 ShipDataPackage     (\u8bf7\u6c42\u6570\u636e)<\/p>\n<h4>3.3 \u95ee\u9898\u4ee3\u7801<\/h4>\n<p><span class=\"token comment\">\/\/ \u9759\u6001\u4e8b\u4ef6\u4ee3\u7406\u2014\u2014\u5168\u5c40\u5355\u4f8b&#xff0c;\u751f\u547d\u5468\u671f\u4e0e\u8fdb\u7a0b\u4e00\u81f4<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">SyncEventBroker<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u9759\u6001\u4e8b\u4ef6\u2014\u2014\u6240\u6709\u8ba2\u9605\u8005\u90fd\u4f1a\u88ab\u6839\u5f15\u7528\u951a\u5b9a<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">event<\/span> <span class=\"token class-name\">EventHandler<span class=\"token punctuation\">&lt;<\/span>SyncCompletedEventArgs<span class=\"token punctuation\">&gt;<\/span><\/span> SyncCompleted<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">void<\/span><\/span> <span class=\"token function\">RaiseSyncCompleted<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">ShipDataPackage<\/span> package<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        SyncCompleted<span class=\"token punctuation\">?.<\/span><span class=\"token function\">Invoke<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token constructor-invocation class-name\">SyncCompletedEventArgs<\/span><span class=\"token punctuation\">(<\/span>package<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u540c\u6b65\u5904\u7406\u5668\u2014\u2014\u6bcf\u6b21\u8bf7\u6c42\u521b\u5efa\u4e00\u4e2a\u5b9e\u4f8b&#xff08;Scoped&#xff09;<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">SyncHandler<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">readonly<\/span> <span class=\"token class-name\">ShipDataPackage<\/span> _package<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token function\">SyncHandler<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">ShipDataPackage<\/span> package<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        _package <span class=\"token operator\">&#061;<\/span> package<span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u274c \u81f4\u547d\u95ee\u9898&#xff1a;\u8ba2\u9605\u9759\u6001\u4e8b\u4ef6\u4f46\u4ece\u672a\u53d6\u6d88\u8ba2\u9605&#xff01;<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u6bcf\u4e2a\u8bf7\u6c42\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a SyncHandler \u5b9e\u4f8b&#xff0c;<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u6bcf\u4e2a\u5b9e\u4f8b\u90fd\u8ba2\u9605\u4e86\u9759\u6001\u4e8b\u4ef6&#xff0c;<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u9759\u6001\u4e8b\u4ef6\u7684 InvocationList \u6301\u6709\u6240\u6709 SyncHandler \u5f15\u7528&#xff0c;<\/span><br \/>\n        <span class=\"token comment\">\/\/ SyncHandler \u53c8\u6301\u6709 ShipDataPackage&#xff0c;<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u5bfc\u81f4\u6240\u6709\u8bf7\u6c42\u6570\u636e\u6c38\u8fdc\u65e0\u6cd5\u88ab GC \u56de\u6536&#xff01;<\/span><br \/>\n        SyncEventBroker<span class=\"token punctuation\">.<\/span>SyncCompleted <span class=\"token operator\">&#043;&#061;<\/span> OnSyncCompleted<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">private<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">void<\/span><\/span> <span class=\"token function\">OnSyncCompleted<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\"><span class=\"token keyword\">object<\/span><\/span> sender<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">SyncCompletedEventArgs<\/span> e<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u5904\u7406\u540c\u6b65\u5b8c\u6210\u903b\u8f91<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>e<span class=\"token punctuation\">.<\/span>Package<span class=\"token punctuation\">.<\/span>ShipId <span class=\"token operator\">&#061;&#061;<\/span> _package<span class=\"token punctuation\">.<\/span>ShipId<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token comment\">\/\/ &#8230;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u6cc4\u6f0f\u673a\u5236\u56fe\u89e3&#xff1a;<\/p>\n<p>\u8bf7\u6c421: SyncHandler_1 \u8ba2\u9605 \u2192 \u6301\u6709 Package_1<br \/>\n\u8bf7\u6c422: SyncHandler_2 \u8ba2\u9605 \u2192 \u6301\u6709 Package_2<br \/>\n\u8bf7\u6c423: SyncHandler_3 \u8ba2\u9605 \u2192 \u6301\u6709 Package_3<br \/>\n&#8230;<br \/>\n\u8bf7\u6c4285432: SyncHandler_85432 \u8ba2\u9605 \u2192 \u6301\u6709 Package_85432<\/p>\n<p>\u9759\u6001\u4e8b\u4ef6 InvocationList:<br \/>\n[SyncHandler_1, SyncHandler_2, &#8230;, SyncHandler_85432]<br \/>\n         \u2193 \u5168\u90e8\u88ab\u951a\u5b9a&#xff0c;\u65e0\u6cd5 GC<\/p>\n<h4>3.4 \u4fee\u590d\u65b9\u6848<\/h4>\n<p>\u65b9\u6848\u4e00&#xff1a;\u5b9e\u73b0 IDisposable&#xff0c;\u5728\u8bf7\u6c42\u7ed3\u675f\u65f6\u53d6\u6d88\u8ba2\u9605&#xff08;\u63a8\u8350&#xff09;<\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">SyncHandler<\/span> <span class=\"token punctuation\">:<\/span> <span class=\"token type-list\"><span class=\"token class-name\">IDisposable<\/span><\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">readonly<\/span> <span class=\"token class-name\">ShipDataPackage<\/span> _package<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\"><span class=\"token keyword\">bool<\/span><\/span> _disposed<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token function\">SyncHandler<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">ShipDataPackage<\/span> package<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        _package <span class=\"token operator\">&#061;<\/span> package<span class=\"token punctuation\">;<\/span><br \/>\n        SyncEventBroker<span class=\"token punctuation\">.<\/span>SyncCompleted <span class=\"token operator\">&#043;&#061;<\/span> OnSyncCompleted<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">private<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">void<\/span><\/span> <span class=\"token function\">OnSyncCompleted<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\"><span class=\"token keyword\">object<\/span><\/span> sender<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">SyncCompletedEventArgs<\/span> e<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>_disposed<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/ &#8230;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">void<\/span><\/span> <span class=\"token function\">Dispose<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>_disposed<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            SyncEventBroker<span class=\"token punctuation\">.<\/span>SyncCompleted <span class=\"token operator\">-&#061;<\/span> OnSyncCompleted<span class=\"token punctuation\">;<\/span><br \/>\n            _disposed <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5728 DI \u4e2d\u6ce8\u518c\u4e3a Scoped&#xff0c;\u6846\u67b6\u4f1a\u81ea\u52a8 Dispose<\/span><br \/>\nservices<span class=\"token punctuation\">.<\/span><span class=\"token generic-method\"><span class=\"token function\">AddScoped<\/span><span class=\"token generic class-name\"><span class=\"token punctuation\">&lt;<\/span>SyncHandler<span class=\"token punctuation\">&gt;<\/span><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u65b9\u6848\u4e8c&#xff1a;\u4f7f\u7528\u5f31\u5f15\u7528\u4e8b\u4ef6\u6a21\u5f0f&#xff08;WeakEventManager&#xff09;<\/p>\n<p><span class=\"token comment\">\/\/ .NET \u5185\u7f6e\u7684\u5f31\u4e8b\u4ef6\u7ba1\u7406\u5668\u2014\u2014\u8ba2\u9605\u8005\u4e0d\u4f1a\u88ab\u5f3a\u5f15\u7528\u951a\u5b9a<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">SyncEventBroker<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">readonly<\/span> <span class=\"token class-name\">WeakEventManager<\/span> _weakEventManager <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">event<\/span> <span class=\"token return-type class-name\">EventHandler<span class=\"token punctuation\">&lt;<\/span>SyncCompletedEventArgs<span class=\"token punctuation\">&gt;<\/span><\/span> SyncCompleted<br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">add<\/span> <span class=\"token operator\">&#061;&gt;<\/span> _weakEventManager<span class=\"token punctuation\">.<\/span><span class=\"token function\">AddEventHandler<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">value<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">remove<\/span> <span class=\"token operator\">&#061;&gt;<\/span> _weakEventManager<span class=\"token punctuation\">.<\/span><span class=\"token function\">RemoveEventHandler<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">value<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">void<\/span><\/span> <span class=\"token function\">RaiseSyncCompleted<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">ShipDataPackage<\/span> package<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        _weakEventManager<span class=\"token punctuation\">.<\/span><span class=\"token function\">HandleEvent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token keyword\">new<\/span> <span class=\"token constructor-invocation class-name\">SyncCompletedEventArgs<\/span><span class=\"token punctuation\">(<\/span>package<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">nameof<\/span><span class=\"token punctuation\">(<\/span>SyncCompleted<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u26a0\ufe0f WeakEventManager \u5728 Microsoft.Maui \u5305\u4e2d&#xff0c;\u670d\u52a1\u7aef\u9879\u76ee\u53ef\u81ea\u884c\u5b9e\u73b0\u8f7b\u91cf\u7248&#xff0c;\u6838\u5fc3\u601d\u8def\u662f\u7528 WeakReference \u6301\u6709\u8ba2\u9605\u8005\u3002<\/p>\n<p>\u65b9\u6848\u4e09&#xff1a;\u6539\u7528 MediatR \u7684 INotification&#xff08;\u6700\u5f7b\u5e95&#xff09;<\/p>\n<p><span class=\"token comment\">\/\/ \u7528 MediatR \u7684\u53d1\u5e03\/\u8ba2\u9605\u66ff\u4ee3\u9759\u6001\u4e8b\u4ef6<\/span><br \/>\n<span class=\"token comment\">\/\/ \u5904\u7406\u5668\u6ce8\u518c\u4e3a Scoped&#xff0c;\u8bf7\u6c42\u7ed3\u675f\u81ea\u52a8\u91ca\u653e&#xff0c;\u4e0d\u5b58\u5728\u6cc4\u6f0f<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">SyncCompletedNotification<\/span> <span class=\"token punctuation\">:<\/span> <span class=\"token type-list\"><span class=\"token class-name\">INotification<\/span><\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token return-type class-name\">ShipDataPackage<\/span> Package <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">get<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token keyword\">init<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">SyncCompletedHandler<\/span> <span class=\"token punctuation\">:<\/span> <span class=\"token type-list\"><span class=\"token class-name\">INotificationHandler<span class=\"token punctuation\">&lt;<\/span>SyncCompletedNotification<span class=\"token punctuation\">&gt;<\/span><\/span><\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">async<\/span> <span class=\"token return-type class-name\">Task<\/span> <span class=\"token function\">Handle<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">SyncCompletedNotification<\/span> notification<span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token class-name\">CancellationToken<\/span> cancellationToken<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u5904\u7406\u903b\u8f91&#xff0c;Scoped \u751f\u547d\u5468\u671f&#xff0c;\u8bf7\u6c42\u7ed3\u675f\u81ea\u52a8\u56de\u6536<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>3.5 \u9a8c\u8bc1<\/h4>\n<p>\u4fee\u590d\u540e\u90e8\u7f72&#xff0c;dotnet-counters \u89c2\u6d4b&#xff1a;<\/p>\n<p>gen-2-size:    85 MB    \u2190 \u7a33\u5b9a<br \/>\nloh-size:      12 MB<br \/>\ntime-in-gc:    1.2%<br \/>\nworking-set:   298 MB   \u2190 \u7a33\u5b9a\u5728 300MB \u5de6\u53f3<\/p>\n<p>\u5185\u5b58\u589e\u957f\u66f2\u7ebf\u53d8\u4e3a\u952f\u9f7f\u5f62&#xff08;Gen0\/Gen1 \u56de\u6536\u540e\u4e0b\u964d&#xff09;&#xff0c;\u800c\u975e\u6301\u7eed\u4e0a\u5347\u3002\u95ee\u9898\u89e3\u51b3\u3002<\/p>\n<p>\u6559\u8bad&#xff1a; \u9759\u6001\u4e8b\u4ef6\u662f .NET \u4e2d\u6700\u5e38\u89c1\u7684\u5185\u5b58\u6cc4\u6f0f\u6e90\u4e4b\u4e00\u3002\u4efb\u4f55\u8ba2\u9605\u9759\u6001\u4e8b\u4ef6\u7684\u5bf9\u8c61&#xff0c;\u5176\u751f\u547d\u5468\u671f\u90fd\u4f1a\u88ab&#034;\u63d0\u5347&#034;\u5230\u4e0e\u8fdb\u7a0b\u4e00\u81f4\u3002\u9664\u975e\u624b\u52a8\u53d6\u6d88\u8ba2\u9605&#xff0c;\u5426\u5219\u6c38\u8fdc\u65e0\u6cd5\u56de\u6536\u3002<\/p>\n<hr \/>\n<h3>\u56db\u3001\u6848\u4f8b\u4e8c&#xff1a;Timer \u4e0d\u505c\u6b62\u2014\u2014\u540e\u53f0\u4efb\u52a1\u7684&#034;\u5b9a\u65f6\u70b8\u5f39&#034;<\/h3>\n<h4>4.1 \u73b0\u8c61<\/h4>\n<p>PMS \u7cfb\u7edf\u6709\u4e00\u4e2a\u5b9a\u65f6\u62a5\u8868\u751f\u6210\u670d\u52a1&#xff0c;\u6bcf 5 \u5206\u949f\u751f\u6210\u4e00\u6b21\u8239\u8236\u8bbe\u5907\u8fd0\u884c\u72b6\u6001\u62a5\u8868\u3002\u4e0a\u7ebf\u540e\u53d1\u73b0\u5185\u5b58\u7f13\u6162\u589e\u957f&#xff0c;\u540c\u65f6 Gen2 GC \u95f4\u9694\u8d8a\u6765\u8d8a\u77ed&#xff0c;\u6700\u7ec8 GC \u505c\u987f\u8fbe\u5230 300ms&#043;&#xff0c;\u5f71\u54cd API \u54cd\u5e94\u65f6\u95f4\u3002<\/p>\n<p>\u8fd9\u4e2a\u95ee\u9898\u7684\u7279\u6b8a\u4e4b\u5904\u5728\u4e8e&#xff1a;\u5185\u5b58\u589e\u957f\u975e\u5e38\u7f13\u6162&#xff08;\u6bcf\u5929\u7ea6 50MB&#xff09;&#xff0c;\u4e0d\u5bb9\u6613\u5728\u6d4b\u8bd5\u73af\u5883\u590d\u73b0&#xff0c;\u4f46\u5728\u751f\u4ea7\u73af\u5883\u8dd1\u4e86\u4e00\u4e2a\u6708\u540e\u7d2f\u79ef\u5230 1.5GB\u3002<\/p>\n<h4>4.2 \u5b9a\u4f4d<\/h4>\n<p>dotnet-counters \u663e\u793a&#xff1a;<\/p>\n<p>gen-2-size:        1,240 MB<br \/>\nloh-size:            340 MB    \u2190 LOH \u4e5f\u504f\u9ad8<br \/>\ntime-in-gc:          12.5%    \u2190 GC \u5360\u6bd4\u8fc7\u9ad8<br \/>\nalloc-rate:           45 MB\/s \u2190 \u6301\u7eed\u5206\u914d<\/p>\n<p>Dump \u5206\u6790&#xff1a;<\/p>\n<p>&gt; dumpheap -stat<\/p>\n<p>    MT     Count    TotalSize  Class Name<br \/>\n00007f&#8230;   8642   412,672,000  Pms.Reports.Models.DeviceStatusReport<br \/>\n00007f&#8230;   8640   207,360,000  Pms.Reports.Services.ReportGenerator<br \/>\n00007f&#8230;   8640    82,944,000  System.Threading.Timer<br \/>\n00007f&#8230;   8640    41,472,000  System.Threading.TimerHolder<br \/>\n00007f&#8230;   8642   345,680,000  System.Byte[]<br \/>\n&#8230;<\/p>\n<p>8,640 \u4e2a Timer \u5bf9\u8c61&#xff01; \u6bcf 5 \u5206\u949f\u4e00\u4e2a&#xff0c;\u4e00\u4e2a\u6708 &#061; 30 \u5929 \u00d7 24 \u5c0f\u65f6 \u00d7 12 \u6b21 &#061; 8,640 \u6b21\u3002\u6570\u5b57\u5b8c\u5168\u543b\u5408\u3002<\/p>\n<p>&gt; gcroot 000001a2b3c4d5e0<\/p>\n<p>Thread 5678:<br \/>\n-&gt; 000001a1b2c3d4e5   Pms.Reports.Services.ReportScheduler   (\u5355\u4f8b)<br \/>\n-&gt; 000001a1b2c3d4f0   System.Collections.Generic.List&lt;ReportGenerator&gt;<br \/>\n-&gt; 000001a1b2c3d4e0   Pms.Reports.Services.ReportGenerator<br \/>\n-&gt; 000001a1b2c3d4d0   System.Threading.Timer<\/p>\n<h4>4.3 \u95ee\u9898\u4ee3\u7801<\/h4>\n<p><span class=\"token comment\">\/\/ \u62a5\u8868\u8c03\u5ea6\u5668\u2014\u2014\u5355\u4f8b\u670d\u52a1<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ReportScheduler<\/span> <span class=\"token punctuation\">:<\/span> <span class=\"token type-list\"><span class=\"token class-name\">IHostedService<\/span><\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">readonly<\/span> <span class=\"token class-name\">IServiceScopeFactory<\/span> _scopeFactory<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">Timer<\/span> _timer<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u274c \u95ee\u9898\u4e00&#xff1a;\u7528 List \u6301\u6709\u6bcf\u6b21\u521b\u5efa\u7684 generator&#xff0c;\u4ece\u672a\u6e05\u7406<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">readonly<\/span> <span class=\"token class-name\">List<span class=\"token punctuation\">&lt;<\/span>ReportGenerator<span class=\"token punctuation\">&gt;<\/span><\/span> _activeGenerators <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token return-type class-name\">Task<\/span> <span class=\"token function\">StartAsync<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">CancellationToken<\/span> cancellationToken<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        _timer <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token constructor-invocation class-name\">Timer<\/span><span class=\"token punctuation\">(<\/span>GenerateReport<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            TimeSpan<span class=\"token punctuation\">.<\/span><span class=\"token function\">FromMinutes<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> TimeSpan<span class=\"token punctuation\">.<\/span><span class=\"token function\">FromMinutes<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> Task<span class=\"token punctuation\">.<\/span>CompletedTask<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">private<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">void<\/span><\/span> <span class=\"token function\">GenerateReport<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\"><span class=\"token keyword\">object<\/span><\/span> state<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u274c \u95ee\u9898\u4e8c&#xff1a;\u6bcf\u6b21\u89e6\u53d1\u90fd\u521b\u5efa\u65b0\u7684 scope \u548c generator&#xff0c;<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u4f46\u751f\u6210\u5b8c\u6210\u540e scope \u6ca1\u6709\u88ab Dispose&#xff01;<\/span><br \/>\n        <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> scope <span class=\"token operator\">&#061;<\/span> _scopeFactory<span class=\"token punctuation\">.<\/span><span class=\"token function\">CreateScope<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> generator <span class=\"token operator\">&#061;<\/span> ActivatorUtilities<span class=\"token punctuation\">.<\/span><span class=\"token generic-method\"><span class=\"token function\">CreateInstance<\/span><span class=\"token generic class-name\"><span class=\"token punctuation\">&lt;<\/span>ReportGenerator<span class=\"token punctuation\">&gt;<\/span><\/span><\/span><span class=\"token punctuation\">(<\/span><br \/>\n            scope<span class=\"token punctuation\">.<\/span>ServiceProvider<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        _activeGenerators<span class=\"token punctuation\">.<\/span><span class=\"token function\">Add<\/span><span class=\"token punctuation\">(<\/span>generator<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u52a0\u5165\u5217\u8868&#xff0c;\u6c38\u4e0d\u79fb\u9664<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u540c\u6b65\u6267\u884c\u2014\u2014\u963b\u585e Timer \u7ebf\u7a0b\u6c60\u7ebf\u7a0b<\/span><br \/>\n        generator<span class=\"token punctuation\">.<\/span><span class=\"token function\">Generate<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/ scope.Dispose() \u4ece\u672a\u8c03\u7528&#xff01;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token return-type class-name\">Task<\/span> <span class=\"token function\">StopAsync<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">CancellationToken<\/span> cancellationToken<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        _timer<span class=\"token punctuation\">?.<\/span><span class=\"token function\">Change<\/span><span class=\"token punctuation\">(<\/span>Timeout<span class=\"token punctuation\">.<\/span>Infinite<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> Task<span class=\"token punctuation\">.<\/span>CompletedTask<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ReportGenerator<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">readonly<\/span> <span class=\"token class-name\">IPmsRepository<\/span> _repository<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\"><span class=\"token keyword\">byte<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><\/span> _reportBuffer<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u62a5\u8868\u6570\u636e\u7f13\u51b2\u533a&#xff08;\u5927\u5bf9\u8c61&#xff0c;\u8fdb LOH&#xff09;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token function\">ReportGenerator<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">IPmsRepository<\/span> repository<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        _repository <span class=\"token operator\">&#061;<\/span> repository<span class=\"token punctuation\">;<\/span><br \/>\n        _reportBuffer <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token constructor-invocation class-name\"><span class=\"token keyword\">byte<\/span><\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">1024<\/span> <span class=\"token operator\">*<\/span> <span class=\"token number\">1024<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ 1MB \u7f13\u51b2\u533a \u2192 LOH<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">void<\/span><\/span> <span class=\"token function\">Generate<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u4ece\u6570\u636e\u5e93\u52a0\u8f7d\u8bbe\u5907\u72b6\u6001&#xff0c;\u751f\u6210\u62a5\u8868<\/span><br \/>\n        <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> devices <span class=\"token operator\">&#061;<\/span> _repository<span class=\"token punctuation\">.<\/span><span class=\"token generic-method\"><span class=\"token function\">GetAll<\/span><span class=\"token generic class-name\"><span class=\"token punctuation\">&lt;<\/span>DeviceInfo<span class=\"token punctuation\">&gt;<\/span><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">ToList<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">foreach<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> device <span class=\"token keyword\">in<\/span> devices<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token comment\">\/\/ \u586b\u5145\u62a5\u8868\u6570\u636e\u5230 _reportBuffer<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u53cc\u91cd\u6cc4\u6f0f&#xff1a;<\/p>\n<li>Timer \u6cc4\u6f0f&#xff1a;CreateScope() \u521b\u5efa\u7684 DI Scope \u4ece\u672a Dispose&#xff0c;Scope \u5185\u6240\u6709 Scoped \u670d\u52a1&#xff08;\u5305\u62ec DbContext\u3001Repository&#xff09;\u90fd\u65e0\u6cd5\u91ca\u653e<\/li>\n<li>LOH \u788e\u7247&#xff1a;\u6bcf\u4e2a ReportGenerator \u6301\u6709 1MB \u7684 _reportBuffer&#xff08;\u8fdb\u5165 LOH&#xff09;&#xff0c;8640 \u4e2a\u5bf9\u8c61\u5bfc\u81f4 LOH \u81a8\u80c0\u5230 340MB&#xff0c;\u4e14 LOH \u9ed8\u8ba4\u4e0d\u538b\u7f29&#xff0c;\u4ea7\u751f\u4e25\u91cd\u788e\u7247<\/li>\n<h4>4.4 \u4fee\u590d\u65b9\u6848<\/h4>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ReportScheduler<\/span> <span class=\"token punctuation\">:<\/span> <span class=\"token type-list\"><span class=\"token class-name\">BackgroundService<\/span><\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">readonly<\/span> <span class=\"token class-name\">IServiceScopeFactory<\/span> _scopeFactory<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">readonly<\/span> <span class=\"token class-name\">ILogger<span class=\"token punctuation\">&lt;<\/span>ReportScheduler<span class=\"token punctuation\">&gt;<\/span><\/span> _logger<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token function\">ReportScheduler<\/span><span class=\"token punctuation\">(<\/span><br \/>\n        <span class=\"token class-name\">IServiceScopeFactory<\/span> scopeFactory<span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token class-name\">ILogger<span class=\"token punctuation\">&lt;<\/span>ReportScheduler<span class=\"token punctuation\">&gt;<\/span><\/span> logger<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        _scopeFactory <span class=\"token operator\">&#061;<\/span> scopeFactory<span class=\"token punctuation\">;<\/span><br \/>\n        _logger <span class=\"token operator\">&#061;<\/span> logger<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">protected<\/span> <span class=\"token keyword\">override<\/span> <span class=\"token keyword\">async<\/span> <span class=\"token return-type class-name\">Task<\/span> <span class=\"token function\">ExecuteAsync<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">CancellationToken<\/span> stoppingToken<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u4f7f\u7528 PeriodicTimer&#xff08;.NET 6&#043;&#xff09;&#xff0c;\u6bd4 Timer \u66f4\u5b89\u5168<\/span><br \/>\n        <span class=\"token keyword\">using<\/span> <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> timer <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token constructor-invocation class-name\">PeriodicTimer<\/span><span class=\"token punctuation\">(<\/span>TimeSpan<span class=\"token punctuation\">.<\/span><span class=\"token function\">FromMinutes<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">await<\/span> timer<span class=\"token punctuation\">.<\/span><span class=\"token function\">WaitForNextTickAsync<\/span><span class=\"token punctuation\">(<\/span>stoppingToken<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">try<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token comment\">\/\/ \u2705 using \u786e\u4fdd scope \u88ab Dispose&#xff0c;\u6240\u6709 Scoped \u670d\u52a1\u91ca\u653e<\/span><br \/>\n                <span class=\"token keyword\">using<\/span> <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> scope <span class=\"token operator\">&#061;<\/span> _scopeFactory<span class=\"token punctuation\">.<\/span><span class=\"token function\">CreateScope<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> generator <span class=\"token operator\">&#061;<\/span> scope<span class=\"token punctuation\">.<\/span>ServiceProvider<br \/>\n                    <span class=\"token punctuation\">.<\/span><span class=\"token generic-method\"><span class=\"token function\">GetRequiredService<\/span><span class=\"token generic class-name\"><span class=\"token punctuation\">&lt;<\/span>ReportGenerator<span class=\"token punctuation\">&gt;<\/span><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>                <span class=\"token keyword\">await<\/span> generator<span class=\"token punctuation\">.<\/span><span class=\"token function\">GenerateAsync<\/span><span class=\"token punctuation\">(<\/span>stoppingToken<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token keyword\">catch<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">OperationCanceledException<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token keyword\">catch<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Exception<\/span> ex<span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                _logger<span class=\"token punctuation\">.<\/span><span class=\"token function\">LogError<\/span><span class=\"token punctuation\">(<\/span>ex<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;\u62a5\u8868\u751f\u6210\u5931\u8d25&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ReportGenerator<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">readonly<\/span> <span class=\"token class-name\">IPmsRepository<\/span> _repository<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u2705 \u4f7f\u7528 ArrayPool \u79df\u501f\u7f13\u51b2\u533a&#xff0c;\u907f\u514d LOH \u5206\u914d<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">readonly<\/span> <span class=\"token class-name\">ArrayPool<span class=\"token punctuation\">&lt;<\/span><span class=\"token keyword\">byte<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> BufferPool <span class=\"token operator\">&#061;<\/span><br \/>\n        ArrayPool<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">byte<\/span><span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">.<\/span>Shared<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token function\">ReportGenerator<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">IPmsRepository<\/span> repository<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        _repository <span class=\"token operator\">&#061;<\/span> repository<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">async<\/span> <span class=\"token return-type class-name\">Task<\/span> <span class=\"token function\">GenerateAsync<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">CancellationToken<\/span> ct<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> buffer <span class=\"token operator\">&#061;<\/span> BufferPool<span class=\"token punctuation\">.<\/span><span class=\"token function\">Rent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1024<\/span> <span class=\"token operator\">*<\/span> <span class=\"token number\">1024<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">try<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> devices <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> _repository<span class=\"token punctuation\">.<\/span><span class=\"token generic-method\"><span class=\"token function\">GetAll<\/span><span class=\"token generic class-name\"><span class=\"token punctuation\">&lt;<\/span>DeviceInfo<span class=\"token punctuation\">&gt;<\/span><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token punctuation\">.<\/span><span class=\"token function\">ToListAsync<\/span><span class=\"token punctuation\">(<\/span>ct<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token comment\">\/\/ \u4f7f\u7528 buffer \u751f\u6210\u62a5\u8868<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">finally<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token comment\">\/\/ \u2705 \u5f52\u8fd8\u7f13\u51b2\u533a&#xff0c;\u4e0d\u4ea7\u751f GC \u538b\u529b<\/span><br \/>\n            BufferPool<span class=\"token punctuation\">.<\/span><span class=\"token function\">Return<\/span><span class=\"token punctuation\">(<\/span>buffer<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>4.5 \u9a8c\u8bc1<\/h4>\n<p>gen-2-size:    62 MB<br \/>\nloh-size:       8 MB     \u2190 ArrayPool \u6548\u679c\u663e\u8457<br \/>\ntime-in-gc:    0.8%<br \/>\nworking-set:   245 MB<\/p>\n<p>\u6559\u8bad&#xff1a; Timer\/PeriodicTimer \u56de\u8c03\u4e2d\u521b\u5efa\u7684 DI Scope \u5fc5\u987b Dispose\u3002\u5927\u5bf9\u8c61\u7f13\u51b2\u533a\u4f18\u5148\u4f7f\u7528 ArrayPool&lt;T&gt;.Shared&#xff0c;\u907f\u514d LOH \u788e\u7247\u3002\u4f7f\u7528 BackgroundService &#043; PeriodicTimer \u66ff\u4ee3\u624b\u52a8 Timer&#xff0c;\u751f\u547d\u5468\u671f\u7531\u6846\u67b6\u7ba1\u7406\u3002<\/p>\n<hr \/>\n<h3>\u4e94\u3001\u6848\u4f8b\u4e09&#xff1a;\u975e\u6258\u7ba1\u5185\u5b58\u6cc4\u6f0f\u2014\u2014\u88ab\u5ffd\u7565\u7684 SafeHandle<\/h3>\n<h4>5.1 \u73b0\u8c61<\/h4>\n<p>\u8fd9\u4e2a\u6848\u4f8b\u6700\u4e3a\u68d8\u624b\u3002PMS \u7cfb\u7edf\u7684\u8bc1\u4e66\u4e0e\u7535\u5b50\u7b7e\u7ae0\u6a21\u5757\u8d1f\u8d23\u5bf9\u8239\u5cb8\u540c\u6b65\u7684\u62a5\u6587\u8fdb\u884c\u6570\u5b57\u7b7e\u540d\u548c\u9a8c\u7b7e\u3002\u4e0a\u7ebf\u540e\u53d1\u73b0\u5185\u5b58\u589e\u957f&#xff0c;\u4f46\u4e0e\u524d\u4e24\u4e2a\u6848\u4f8b\u4e0d\u540c&#xff1a;<\/p>\n<p>dotnet-counters \u89c2\u6d4b&#xff1a;<br \/>\nworking-set:       2.1 GB     \u2190 \u8fdb\u7a0b\u5185\u5b58\u5f88\u9ad8<br \/>\ngc-heap-size:        180 MB   \u2190 \u4f46\u6258\u7ba1\u5806\u5f88\u5c0f&#xff01;<br \/>\ngen-2-size:           45 MB<br \/>\nloh-size:             12 MB<\/p>\n<p>\u6258\u7ba1\u5806\u53ea\u6709 180MB&#xff0c;\u4f46\u8fdb\u7a0b\u5de5\u4f5c\u96c6\u9ad8\u8fbe 2.1GB&#xff01; \u8fd9\u610f\u5473\u7740\u6cc4\u6f0f\u53d1\u751f\u5728\u975e\u6258\u7ba1\u5c42\u3002<\/p>\n<h4>5.2 \u5b9a\u4f4d<\/h4>\n<p>\u9996\u5148\u786e\u8ba4\u975e\u6258\u7ba1\u5185\u5b58\u6765\u6e90\u3002.NET \u8fdb\u7a0b\u7684\u975e\u6258\u7ba1\u5185\u5b58\u53ef\u80fd\u6765\u81ea&#xff1a;<\/p>\n<li>P\/Invoke \u8c03\u7528\u7684\u539f\u751f\u5e93<\/li>\n<li>GCHandle.Alloc \u5206\u914d\u7684\u975e\u6258\u7ba1\u5185\u5b58<\/li>\n<li>\u672a\u91ca\u653e\u7684 SafeHandle\/HandleRef<\/li>\n<li>JIT \u7f16\u8bd1\u7684\u4ee3\u7801\u7f13\u5b58&#xff08;\u901a\u5e38\u4e0d\u5927&#xff09;<\/li>\n<p>\u67e5\u770b GCHandle&#xff1a;<\/p>\n<p>&gt; gchandles<\/p>\n<p>Handles:<br \/>\n    Strong Handles:       45<br \/>\n    Pinned Handles:       12<br \/>\n    Weak Long Handles:    8<br \/>\n    Weak Short Handles:   23<\/p>\n<p>    Ref Counted Handles:  8642    \u2190 \u5f02\u5e38&#xff01;\u6b63\u5e38\u5e94\u8be5\u5f88\u5c11<\/p>\n<p>8,642 \u4e2a Ref Counted Handles&#xff01;\u8fd9\u7c7b Handle \u901a\u5e38\u7528\u4e8e COM Interop \u6216 Marshal \u5206\u914d\u3002<\/p>\n<p>\u67e5\u770b\u7ec8\u7ed3\u5316\u961f\u5217&#xff1a;<\/p>\n<p>&gt; finalizequeue<\/p>\n<p>Heap 0:<br \/>\n  Free-Threaded Youngest GC enqueued: 0<br \/>\n  Free-Threaded Old GC enqueued: 0<br \/>\n  Normal Youngest GC enqueued: 0<br \/>\n  Normal Old GC enqueued: 0<br \/>\n  &#8230;<\/p>\n<p>Heap 1:<br \/>\n  &#8230;<br \/>\n  Normal Old GC enqueued: 8642    \u2190 8642 \u4e2a\u5bf9\u8c61\u5728\u7ec8\u7ed3\u5316\u961f\u5217\u4e0a&#xff01;<\/p>\n<p>8,642 \u4e2a\u5bf9\u8c61\u7b49\u5f85\u7ec8\u7ed3\u5316\u4f46\u4e00\u76f4\u6ca1\u88ab\u7ec8\u7ed3\u3002\u67e5\u770b\u5177\u4f53\u7c7b\u578b&#xff1a;<\/p>\n<p>&gt; dumpheap -stat -finalizable<\/p>\n<p>    MT     Count    TotalSize  Class Name<br \/>\n00007f&#8230;   8642   138,272,000  Pms.Security.NativeSignature<br \/>\n00007f&#8230;   8642    69,136,000  System.Runtime.InteropServices.SafeHandle<br \/>\n00007f&#8230;   8642    34,568,000  Microsoft.Win32.SafeHandles.SafeHandleZeroOrMinusOneIsInvalid<\/p>\n<h4>5.3 \u95ee\u9898\u4ee3\u7801<\/h4>\n<p><span class=\"token comment\">\/\/ \u7535\u5b50\u7b7e\u7ae0\u6a21\u5757\u2014\u2014\u5c01\u88c5\u4e86\u539f\u751f\u7b7e\u540d\u5e93<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">NativeSignature<\/span> <span class=\"token punctuation\">:<\/span> <span class=\"token type-list\"><span class=\"token class-name\">IDisposable<\/span><\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">IntPtr<\/span> _nativeContext<span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u539f\u751f\u5e93\u4e0a\u4e0b\u6587\u6307\u9488<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\"><span class=\"token keyword\">bool<\/span><\/span> _disposed<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token function\">NativeSignature<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u8c03\u7528\u539f\u751f\u5e93\u521b\u5efa\u7b7e\u540d\u4e0a\u4e0b\u6587<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u6bcf\u4e2a\u4e0a\u4e0b\u6587\u5728\u539f\u751f\u4fa7\u5360\u7528\u7ea6 200KB \u5185\u5b58<\/span><br \/>\n        _nativeContext <span class=\"token operator\">&#061;<\/span> NativeMethods<span class=\"token punctuation\">.<\/span><span class=\"token function\">CreateSignatureContext<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">byte<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><\/span> <span class=\"token function\">Sign<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\"><span class=\"token keyword\">byte<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><\/span> data<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> signature <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token constructor-invocation class-name\"><span class=\"token keyword\">byte<\/span><\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">256<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        NativeMethods<span class=\"token punctuation\">.<\/span><span class=\"token function\">SignData<\/span><span class=\"token punctuation\">(<\/span>_nativeContext<span class=\"token punctuation\">,<\/span> data<span class=\"token punctuation\">,<\/span> data<span class=\"token punctuation\">.<\/span>Length<span class=\"token punctuation\">,<\/span><br \/>\n            signature<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">ref<\/span> signature<span class=\"token punctuation\">.<\/span>Length<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> signature<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u274c \u95ee\u9898\u4e00&#xff1a;\u5b9e\u73b0\u4e86 IDisposable \u4f46\u8c03\u7528\u65b9\u4ece\u672a Dispose<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u8fd9\u4e9b\u5bf9\u8c61\u8fdb\u5165\u7ec8\u7ed3\u5316\u961f\u5217\u7b49\u5f85 Finalize<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">void<\/span><\/span> <span class=\"token function\">Dispose<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">Dispose<\/span><span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        GC<span class=\"token punctuation\">.<\/span><span class=\"token function\">SuppressFinalize<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token operator\">~<\/span><span class=\"token function\">NativeSignature<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">Dispose<\/span><span class=\"token punctuation\">(<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">protected<\/span> <span class=\"token keyword\">virtual<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">void<\/span><\/span> <span class=\"token function\">Dispose<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\"><span class=\"token keyword\">bool<\/span><\/span> disposing<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>_disposed<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token comment\">\/\/ \u274c \u95ee\u9898\u4e8c&#xff1a;\u7ec8\u7ed3\u5668\u4e2d\u8bbf\u95ee\u4e86 _nativeContext&#xff0c;<\/span><br \/>\n            <span class=\"token comment\">\/\/ \u4f46\u7ec8\u7ed3\u5668\u6267\u884c\u987a\u5e8f\u4e0d\u4fdd\u8bc1&#xff0c;<\/span><br \/>\n            <span class=\"token comment\">\/\/ \u5982\u679c\u539f\u751f\u5e93\u5df2\u88ab\u5378\u8f7d\u6216\u53e5\u67c4\u5df2\u65e0\u6548&#xff0c;<\/span><br \/>\n            <span class=\"token comment\">\/\/ \u53ef\u80fd\u5bfc\u81f4 AccessViolation \u6216\u9759\u9ed8\u5931\u8d25&#xff01;<\/span><br \/>\n            NativeMethods<span class=\"token punctuation\">.<\/span><span class=\"token function\">DestroySignatureContext<\/span><span class=\"token punctuation\">(<\/span>_nativeContext<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            _disposed <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">internal<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">NativeMethods<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token punctuation\">[<\/span><span class=\"token attribute\"><span class=\"token class-name\">DllImport<\/span><span class=\"token attribute-arguments\"><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;PmsSignatureLib&#034;<\/span><span class=\"token punctuation\">,<\/span> EntryPoint <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;CreateSigContext&#034;<\/span><span class=\"token punctuation\">)<\/span><\/span><\/span><span class=\"token punctuation\">]<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">extern<\/span> <span class=\"token return-type class-name\">IntPtr<\/span> <span class=\"token function\">CreateSignatureContext<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token punctuation\">[<\/span><span class=\"token attribute\"><span class=\"token class-name\">DllImport<\/span><span class=\"token attribute-arguments\"><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;PmsSignatureLib&#034;<\/span><span class=\"token punctuation\">,<\/span> EntryPoint <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;DestroySigContext&#034;<\/span><span class=\"token punctuation\">)<\/span><\/span><\/span><span class=\"token punctuation\">]<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">extern<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">int<\/span><\/span> <span class=\"token function\">DestroySignatureContext<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">IntPtr<\/span> context<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token punctuation\">[<\/span><span class=\"token attribute\"><span class=\"token class-name\">DllImport<\/span><span class=\"token attribute-arguments\"><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;PmsSignatureLib&#034;<\/span><span class=\"token punctuation\">,<\/span> EntryPoint <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;SignData&#034;<\/span><span class=\"token punctuation\">)<\/span><\/span><\/span><span class=\"token punctuation\">]<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">extern<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">int<\/span><\/span> <span class=\"token function\">SignData<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">IntPtr<\/span> context<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\"><span class=\"token keyword\">byte<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><\/span> data<span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token class-name\"><span class=\"token keyword\">int<\/span><\/span> dataLen<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\"><span class=\"token keyword\">byte<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><\/span> signature<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">ref<\/span> <span class=\"token class-name\"><span class=\"token keyword\">int<\/span><\/span> signatureLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u8c03\u7528\u65b9\u2014\u2014\u7b7e\u540d\u670d\u52a1<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">SignatureService<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u274c \u95ee\u9898\u4e09&#xff1a;\u6bcf\u6b21\u7b7e\u540d\u90fd\u521b\u5efa\u65b0\u7684 NativeSignature&#xff0c;<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u4f46\u6ca1\u6709 using&#xff0c;\u4e5f\u6ca1\u6709\u624b\u52a8 Dispose<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">byte<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><\/span> <span class=\"token function\">SignData<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\"><span class=\"token keyword\">byte<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><\/span> data<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> signer <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token constructor-invocation class-name\">NativeSignature<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> signer<span class=\"token punctuation\">.<\/span><span class=\"token function\">Sign<\/span><span class=\"token punctuation\">(<\/span>data<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/ signer.Dispose() \u4ece\u672a\u8c03\u7528&#xff01;<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u6bcf\u4e2a signer \u6cc4\u6f0f 200KB \u539f\u751f\u5185\u5b58<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u4e3a\u4ec0\u4e48 Finalizer \u6ca1\u56de\u6536&#xff1f;<\/p>\n<p>\u5173\u952e\u5728\u4e8e&#xff1a;Finalizer \u7ebf\u7a0b\u662f\u5355\u7ebf\u7a0b\u7684\u3002\u5982\u679c\u67d0\u4e9b Finalizer \u6267\u884c\u7f13\u6162\u6216\u963b\u585e&#xff0c;\u540e\u7eed\u5bf9\u8c61\u7684 Finalizer \u5c31\u4f1a\u6392\u961f\u7b49\u5f85\u3002\u5728\u8fd9\u4e2a\u6848\u4f8b\u4e2d&#xff0c;DestroySignatureContext \u539f\u751f\u65b9\u6cd5\u5076\u5c14\u9700\u8981\u7b49\u5f85 USB Key \u786c\u4ef6\u54cd\u5e94&#xff08;\u6700\u957f 10 \u79d2&#xff09;&#xff0c;\u5bfc\u81f4 Finalizer \u7ebf\u7a0b\u88ab\u963b\u585e&#xff0c;8642 \u4e2a\u5bf9\u8c61\u7684\u7ec8\u7ed3\u5316\u5168\u90e8\u6392\u961f\u3002<\/p>\n<h4>5.4 \u4fee\u590d\u65b9\u6848<\/h4>\n<p><span class=\"token comment\">\/\/ \u2705 \u4f7f\u7528 SafeHandle \u66ff\u4ee3 IntPtr\u2014\u2014.NET \u63a8\u8350\u7684\u539f\u751f\u8d44\u6e90\u7ba1\u7406\u65b9\u5f0f<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">SignatureContextHandle<\/span> <span class=\"token punctuation\">:<\/span> <span class=\"token type-list\"><span class=\"token class-name\">SafeHandleZeroOrMinusOneIsInvalid<\/span><\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token function\">SignatureContextHandle<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">:<\/span> <span class=\"token keyword\">base<\/span><span class=\"token punctuation\">(<\/span><span class=\"token named-parameter punctuation\">ownsHandle<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">protected<\/span> <span class=\"token keyword\">override<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">bool<\/span><\/span> <span class=\"token function\">ReleaseHandle<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ SafeHandle \u7684 ReleaseHandle \u7531\u5173\u952e\u6267\u884c\u533a\u57df&#xff08;CER&#xff09;\u4fdd\u62a4&#xff0c;<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u4fdd\u8bc1\u5728\u5f02\u6b65\u5f02\u5e38&#xff08;\u5982 ThreadAbortException&#xff09;\u65f6\u4e5f\u80fd\u6267\u884c<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> NativeMethods<span class=\"token punctuation\">.<\/span><span class=\"token function\">DestroySignatureContext<\/span><span class=\"token punctuation\">(<\/span>handle<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">NativeSignature<\/span> <span class=\"token punctuation\">:<\/span> <span class=\"token type-list\"><span class=\"token class-name\">IDisposable<\/span><\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">readonly<\/span> <span class=\"token class-name\">SignatureContextHandle<\/span> _handle<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\"><span class=\"token keyword\">bool<\/span><\/span> _disposed<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token function\">NativeSignature<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        _handle <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token constructor-invocation class-name\">SignatureContextHandle<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> context <span class=\"token operator\">&#061;<\/span> NativeMethods<span class=\"token punctuation\">.<\/span><span class=\"token function\">CreateSignatureContext<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>context <span class=\"token operator\">&#061;&#061;<\/span> IntPtr<span class=\"token punctuation\">.<\/span>Zero<span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">throw<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token constructor-invocation class-name\">InvalidOperationException<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u521b\u5efa\u7b7e\u540d\u4e0a\u4e0b\u6587\u5931\u8d25&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u4f7f\u7528 SetHandle \u8bbe\u7f6e SafeHandle \u7684\u5e95\u5c42\u53e5\u67c4<\/span><br \/>\n        _handle<span class=\"token punctuation\">.<\/span><span class=\"token function\">SetHandle<\/span><span class=\"token punctuation\">(<\/span>context<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">byte<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><\/span> <span class=\"token function\">Sign<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\"><span class=\"token keyword\">byte<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><\/span> data<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> signature <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token constructor-invocation class-name\"><span class=\"token keyword\">byte<\/span><\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">256<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\"><span class=\"token keyword\">int<\/span><\/span> sigLen <span class=\"token operator\">&#061;<\/span> signature<span class=\"token punctuation\">.<\/span>Length<span class=\"token punctuation\">;<\/span><br \/>\n        NativeMethods<span class=\"token punctuation\">.<\/span><span class=\"token function\">SignData<\/span><span class=\"token punctuation\">(<\/span>_handle<span class=\"token punctuation\">.<\/span><span class=\"token function\">DangerousGetHandle<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            data<span class=\"token punctuation\">,<\/span> data<span class=\"token punctuation\">.<\/span>Length<span class=\"token punctuation\">,<\/span> signature<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">ref<\/span> sigLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> signature<span class=\"token punctuation\">.<\/span><span class=\"token function\">Take<\/span><span class=\"token punctuation\">(<\/span>sigLen<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">ToArray<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">void<\/span><\/span> <span class=\"token function\">Dispose<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>_disposed<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token comment\">\/\/ \u2705 SafeHandle.Dispose \u4f1a\u89e6\u53d1 ReleaseHandle<\/span><br \/>\n            <span class=\"token comment\">\/\/ \u4e14 SafeHandle \u4f7f\u7528\u5f15\u7528\u8ba1\u6570&#xff0c;\u7ebf\u7a0b\u5b89\u5168<\/span><br \/>\n            _handle<span class=\"token punctuation\">.<\/span><span class=\"token function\">Dispose<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            _disposed <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u8c03\u7528\u65b9\u2014\u2014\u786e\u4fdd Dispose<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">SignatureService<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">byte<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><\/span> <span class=\"token function\">SignData<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\"><span class=\"token keyword\">byte<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><\/span> data<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u2705 using \u786e\u4fdd Dispose \u88ab\u8c03\u7528<\/span><br \/>\n        <span class=\"token keyword\">using<\/span> <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> signer <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token constructor-invocation class-name\">NativeSignature<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> signer<span class=\"token punctuation\">.<\/span><span class=\"token function\">Sign<\/span><span class=\"token punctuation\">(<\/span>data<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u66f4\u597d\u7684\u65b9\u6848&#xff1a;\u6ce8\u518c\u4e3a\u5355\u4f8b&#xff0c;\u590d\u7528\u7b7e\u540d\u4e0a\u4e0b\u6587<\/span><br \/>\n<span class=\"token comment\">\/\/ \u539f\u751f\u5e93\u901a\u5e38\u652f\u6301\u591a\u7ebf\u7a0b\u5b89\u5168\u7b7e\u540d<\/span><br \/>\nservices<span class=\"token punctuation\">.<\/span><span class=\"token generic-method\"><span class=\"token function\">AddSingleton<\/span><span class=\"token generic class-name\"><span class=\"token punctuation\">&lt;<\/span>NativeSignature<span class=\"token punctuation\">&gt;<\/span><\/span><\/span><span class=\"token punctuation\">(<\/span>sp <span class=\"token operator\">&#061;&gt;<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> signer <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token constructor-invocation class-name\">NativeSignature<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> signer<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5982\u679c\u539f\u751f\u5e93\u4e0d\u662f\u7ebf\u7a0b\u5b89\u5168\u7684&#xff0c;\u4f7f\u7528\u6c60\u5316<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">SignaturePool<\/span> <span class=\"token punctuation\">:<\/span> <span class=\"token type-list\"><span class=\"token class-name\">IDisposable<\/span><\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">readonly<\/span> <span class=\"token class-name\">ConcurrentBag<span class=\"token punctuation\">&lt;<\/span>NativeSignature<span class=\"token punctuation\">&gt;<\/span><\/span> _pool <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\"><span class=\"token keyword\">int<\/span><\/span> _maxSize<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token return-type class-name\">NativeSignature<\/span> <span class=\"token function\">Rent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>_pool<span class=\"token punctuation\">.<\/span><span class=\"token function\">TryTake<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">out<\/span> <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> signer<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> signer<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token constructor-invocation class-name\">NativeSignature<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">void<\/span><\/span> <span class=\"token function\">Return<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">NativeSignature<\/span> signer<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>_pool<span class=\"token punctuation\">.<\/span>Count <span class=\"token operator\">&lt;<\/span> _maxSize<span class=\"token punctuation\">)<\/span><br \/>\n            _pool<span class=\"token punctuation\">.<\/span><span class=\"token function\">Add<\/span><span class=\"token punctuation\">(<\/span>signer<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">else<\/span><br \/>\n            signer<span class=\"token punctuation\">.<\/span><span class=\"token function\">Dispose<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>5.5 \u9a8c\u8bc1<\/h4>\n<p>working-set:       340 MB    \u2190 \u6062\u590d\u6b63\u5e38<br \/>\ngc-heap-size:      160 MB<br \/>\nRef Counted Handles: 3       \u2190 \u6b63\u5e38<br \/>\nFinalizer queue length: 0    \u2190 \u6e05\u7a7a<\/p>\n<p>\u6559\u8bad&#xff1a;<\/p>\n<li>\u975e\u6258\u7ba1\u8d44\u6e90\u5fc5\u987b\u7528 SafeHandle \u7ba1\u7406&#xff0c;\u4e0d\u8981\u81ea\u5df1\u5199 Finalizer\u3002SafeHandle \u6709\u5f15\u7528\u8ba1\u6570\u548c CER \u4fdd\u62a4&#xff0c;\u6bd4\u624b\u5199 Finalizer \u5b89\u5168\u5f97\u591a\u3002<\/li>\n<li>Finalizer \u7ebf\u7a0b\u662f\u5355\u7ebf\u7a0b\u7684&#xff0c;\u4efb\u4f55 Finalizer \u963b\u585e\u90fd\u4f1a\u5bfc\u81f4\u8fde\u9501\u53cd\u5e94\u3002\u6c38\u8fdc\u4e0d\u8981\u5728 Finalizer \u4e2d\u8c03\u7528\u53ef\u80fd\u963b\u585e\u7684\u539f\u751f\u65b9\u6cd5\u3002<\/li>\n<li>working-set \u9ad8\u4f46 gc-heap-size \u4f4e\u662f\u975e\u6258\u7ba1\u5185\u5b58\u6cc4\u6f0f\u7684\u660e\u786e\u4fe1\u53f7&#xff0c;\u7528 gchandles \u548c finalizequeue \u547d\u4ee4\u5b9a\u4f4d\u3002<\/li>\n<hr \/>\n<h3>\u516d\u3001\u5e38\u89c1\u5185\u5b58\u6cc4\u6f0f\u6a21\u5f0f\u901f\u67e5\u8868<\/h3>\n<table>\n<tr>\u6cc4\u6f0f\u6a21\u5f0f\u5178\u578b\u7279\u5f81Dump \u4e2d\u7684\u8868\u73b0\u4fee\u590d\u65b9\u5f0f<\/tr>\n<tbody>\n<tr>\n<td>\u9759\u6001\u4e8b\u4ef6\u672a\u89e3\u7ed1<\/td>\n<td>Gen2 \u6301\u7eed\u589e\u957f<\/td>\n<td>gcroot \u94fe\u7ecf\u8fc7\u9759\u6001\u4e8b\u4ef6<\/td>\n<td>WeakEventManager \u6216\u663e\u5f0f -&#061;<\/td>\n<\/tr>\n<tr>\n<td>\u9759\u6001\u96c6\u5408\u53ea\u589e\u4e0d\u51cf<\/td>\n<td>Gen2 \u589e\u957f<\/td>\n<td>\u9759\u6001 List\/Dict \u6301\u6709\u5927\u91cf\u5bf9\u8c61<\/td>\n<td>\u8bbe\u7f6e\u5bb9\u91cf\u4e0a\u9650\u6216\u7528\u7f13\u5b58\u7b56\u7565<\/td>\n<\/tr>\n<tr>\n<td>Timer \u672a\u505c\u6b62<\/td>\n<td>\u7f13\u6162\u589e\u957f<\/td>\n<td>Timer\/TimerHolder \u5bf9\u8c61\u7d2f\u79ef<\/td>\n<td>PeriodicTimer &#043; using<\/td>\n<\/tr>\n<tr>\n<td>DI Scope \u672a\u91ca\u653e<\/td>\n<td>Scoped \u670d\u52a1\u6cc4\u6f0f<\/td>\n<td>DbContext\/Repository \u5bf9\u8c61\u7d2f\u79ef<\/td>\n<td>using var scope &#061; &#8230;<\/td>\n<\/tr>\n<tr>\n<td>\u672a Dispose \u7684\u975e\u6258\u7ba1\u8d44\u6e90<\/td>\n<td>\u5de5\u4f5c\u96c6\u9ad8\u3001\u6258\u7ba1\u5806\u4f4e<\/td>\n<td>Ref Counted Handles \u591a<\/td>\n<td>SafeHandle &#043; using<\/td>\n<\/tr>\n<tr>\n<td>\u5927\u5bf9\u8c61\u9891\u7e41\u5206\u914d<\/td>\n<td>LOH \u589e\u957f\u3001\u788e\u7247<\/td>\n<td>loh-size \u9ad8<\/td>\n<td>ArrayPool&lt;T&gt; \/ MemoryPool&lt;T&gt;<\/td>\n<\/tr>\n<tr>\n<td>\u95ed\u5305\u6355\u83b7\u957f\u751f\u547d\u5468\u671f\u5bf9\u8c61<\/td>\n<td>Gen2 \u589e\u957f<\/td>\n<td>\u533f\u540d\u65b9\u6cd5\u5bf9\u8c61\u6301\u6709\u5927\u5bf9\u8c61<\/td>\n<td>\u6ce8\u610f\u95ed\u5305\u6355\u83b7\u8303\u56f4<\/td>\n<\/tr>\n<tr>\n<td>\u5f02\u6b65\u4e8b\u4ef6\u5904\u7406\u5668<\/td>\n<td>\u4efb\u52a1\u5bf9\u8c61\u6cc4\u6f0f<\/td>\n<td>Task\/Action \u7d2f\u79ef<\/td>\n<td>CancellationToken &#043; IAsyncDisposable<\/td>\n<\/tr>\n<tr>\n<td>GCHandle.Alloc \u672a\u91ca\u653e<\/td>\n<td>\u975e\u6258\u7ba1\u5185\u5b58\u589e\u957f<\/td>\n<td>Pinned\/Normal Handles \u591a<\/td>\n<td>using \u5305\u88c5 GCHandle<\/td>\n<\/tr>\n<tr>\n<td>\u65e5\u5fd7\/\u9065\u6d4b\u7d2f\u79ef<\/td>\n<td>\u5185\u5b58\u7f13\u6162\u589e\u957f<\/td>\n<td>\u65e5\u5fd7\u7f13\u51b2\u533a\u5bf9\u8c61\u591a<\/td>\n<td>\u8bbe\u7f6e\u6279\u91cf\u5237\u65b0\u548c\u4e0a\u9650<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h3>\u4e03\u3001GC \u6027\u80fd\u4f18\u5316\u5b9e\u6218\u6280\u5de7<\/h3>\n<h4>7.1 \u51cf\u5c11 Gen2 GC \u9891\u7387<\/h4>\n<p>Gen2 GC \u662f\u6700\u6602\u8d35\u7684&#xff0c;\u4e00\u6b21 Full GC \u53ef\u80fd\u6682\u505c\u5e94\u7528 10-100ms&#043;\u3002\u51cf\u5c11 Gen2 GC \u7684\u6838\u5fc3\u662f\u8ba9\u5bf9\u8c61\u5c3d\u5feb\u5728 Gen0\/Gen1 \u6b7b\u4ea1&#xff0c;\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u664b\u5347\u3002<\/p>\n<p><span class=\"token comment\">\/\/ \u274c \u4e0d\u597d&#xff1a;\u5728\u70ed\u8def\u5f84\u4e0a\u521b\u5efa\u5927\u5bf9\u8c61&#xff0c;\u76f4\u63a5\u8fdb\u5165 LOH \u548c Gen2<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">async<\/span> <span class=\"token return-type class-name\">Task<span class=\"token punctuation\">&lt;<\/span><span class=\"token keyword\">byte<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> <span class=\"token function\">ExportReportAsync<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">ReportQuery<\/span> query<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> allData <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> _dbContext<span class=\"token punctuation\">.<\/span>Reports<br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">Where<\/span><span class=\"token punctuation\">(<\/span>r <span class=\"token operator\">&#061;&gt;<\/span> r<span class=\"token punctuation\">.<\/span>Date <span class=\"token operator\">&gt;&#061;<\/span> query<span class=\"token punctuation\">.<\/span>StartDate<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">ToListAsync<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u53ef\u80fd\u8fd4\u56de\u6570\u4e07\u884c<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u5927\u5b57\u7b26\u4e32\u62fc\u63a5 \u2192 LOH<\/span><br \/>\n    <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> csv <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token constructor-invocation class-name\">StringBuilder<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">foreach<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> row <span class=\"token keyword\">in<\/span> allData<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        csv<span class=\"token punctuation\">.<\/span><span class=\"token function\">AppendLine<\/span><span class=\"token punctuation\">(<\/span><span class=\"token interpolation-string\"><span class=\"token string\">$&#034;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span><span class=\"token expression language-csharp\">row<span class=\"token punctuation\">.<\/span>Id<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">,<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span><span class=\"token expression language-csharp\">row<span class=\"token punctuation\">.<\/span>Name<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">,<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span><span class=\"token expression language-csharp\">row<span class=\"token punctuation\">.<\/span>Value<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> Encoding<span class=\"token punctuation\">.<\/span>UTF8<span class=\"token punctuation\">.<\/span><span class=\"token function\">GetBytes<\/span><span class=\"token punctuation\">(<\/span>csv<span class=\"token punctuation\">.<\/span><span class=\"token function\">ToString<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u2705 \u597d&#xff1a;\u6d41\u5f0f\u5904\u7406 &#043; ArrayPool&#xff0c;\u907f\u514d\u5927\u5bf9\u8c61<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">async<\/span> <span class=\"token return-type class-name\">Task<\/span> <span class=\"token function\">ExportReportAsync<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">ReportQuery<\/span> query<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">Stream<\/span> output<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> buffer <span class=\"token operator\">&#061;<\/span> ArrayPool<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">byte<\/span><span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">.<\/span>Shared<span class=\"token punctuation\">.<\/span><span class=\"token function\">Rent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">81920<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">try<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u5206\u6279\u67e5\u8be2&#xff0c;\u6bcf\u6b21 1000 \u6761<\/span><br \/>\n        <span class=\"token keyword\">await<\/span> <span class=\"token keyword\">foreach<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> batch <span class=\"token keyword\">in<\/span> <span class=\"token function\">QueryBatchesAsync<\/span><span class=\"token punctuation\">(<\/span>query<span class=\"token punctuation\">,<\/span> <span class=\"token named-parameter punctuation\">batchSize<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">1000<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> csv <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">string<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">Join<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                batch<span class=\"token punctuation\">.<\/span><span class=\"token function\">Select<\/span><span class=\"token punctuation\">(<\/span>r <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token interpolation-string\"><span class=\"token string\">$&#034;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span><span class=\"token expression language-csharp\">r<span class=\"token punctuation\">.<\/span>Id<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">,<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span><span class=\"token expression language-csharp\">r<span class=\"token punctuation\">.<\/span>Name<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">,<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span><span class=\"token expression language-csharp\">r<span class=\"token punctuation\">.<\/span>Value<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> bytes <span class=\"token operator\">&#061;<\/span> Encoding<span class=\"token punctuation\">.<\/span>UTF8<span class=\"token punctuation\">.<\/span><span class=\"token function\">GetBytes<\/span><span class=\"token punctuation\">(<\/span>csv<span class=\"token punctuation\">,<\/span> buffer<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">await<\/span> output<span class=\"token punctuation\">.<\/span><span class=\"token function\">WriteAsync<\/span><span class=\"token punctuation\">(<\/span>buffer<span class=\"token punctuation\">.<\/span><span class=\"token function\">AsMemory<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> bytes<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">finally<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        ArrayPool<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">byte<\/span><span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">.<\/span>Shared<span class=\"token punctuation\">.<\/span><span class=\"token function\">Return<\/span><span class=\"token punctuation\">(<\/span>buffer<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>7.2 \u670d\u52a1\u5668 GC vs \u5de5\u4f5c\u7ad9 GC<\/h4>\n<p><span class=\"token comment\">&lt;!&#8211; \u670d\u52a1\u5668 GC&#xff1a;\u591a\u7ebf\u7a0b\u5e76\u884c\u56de\u6536&#xff0c;\u9002\u5408\u9ad8\u541e\u5410\u670d\u52a1 &#8211;&gt;<\/span><br \/>\n<span class=\"token comment\">&lt;!&#8211; \u9ed8\u8ba4\u5728 ASP.NET Core \u4e2d\u542f\u7528 &#8211;&gt;<\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>ServerGarbageCollection<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>true<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>ServerGarbageCollection<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<p><span class=\"token comment\">&lt;!&#8211; \u5de5\u4f5c\u7ad9 GC&#xff1a;\u5355\u7ebf\u7a0b\u56de\u6536&#xff0c;\u6682\u505c\u65f6\u95f4\u77ed\u4f46\u541e\u5410\u4f4e &#8211;&gt;<\/span><br \/>\n<span class=\"token comment\">&lt;!&#8211; \u9002\u5408\u684c\u9762\u5e94\u7528\u6216\u5bb9\u5668\u5185\u5b58\u9650\u5236\u4e25\u683c\u7684\u573a\u666f &#8211;&gt;<\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>ServerGarbageCollection<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>false<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>ServerGarbageCollection<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<p><span class=\"token comment\">&lt;!&#8211; \u5e76\u53d1 GC&#xff1a;\u5728 Gen2 \u56de\u6536\u65f6\u5e76\u53d1\u6267\u884c&#xff0c;\u51cf\u5c11\u6682\u505c\u65f6\u95f4 &#8211;&gt;<\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>ConcurrentGarbageCollection<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>true<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>ConcurrentGarbageCollection<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<h4>7.3 \u5bb9\u5668\u5185\u5b58\u9650\u5236\u914d\u7f6e<\/h4>\n<p>\u5728 Kubernetes \u4e2d\u8fd0\u884c .NET \u5e94\u7528\u65f6&#xff0c;GC \u9700\u8981\u611f\u77e5\u5bb9\u5668\u5185\u5b58\u9650\u5236&#xff1a;<\/p>\n<p># .NET 8&#043; \u9ed8\u8ba4\u652f\u6301 cgroup \u5185\u5b58\u9650\u5236<br \/>\n# \u4f46\u5728\u67d0\u4e9b\u73af\u5883\u4e0b\u53ef\u80fd\u9700\u8981\u663e\u5f0f\u914d\u7f6e<br \/>\nENV DOTNET_GCHeapCount&#061;4<br \/>\nENV DOTNET_GCHighMemoryPct&#061;0x60  # 96%&#xff0c;\u7559\u7ed9\u975e\u6258\u7ba1\u5185\u5b58<\/p>\n<p><span class=\"token key atrule\">resources<\/span><span class=\"token punctuation\">:<\/span><br \/>\n  <span class=\"token key atrule\">requests<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token key atrule\">memory<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;512Mi&#034;<\/span><br \/>\n    <span class=\"token key atrule\">cpu<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;500m&#034;<\/span><br \/>\n  <span class=\"token key atrule\">limits<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token key atrule\">memory<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;1Gi&#034;<\/span>      <span class=\"token comment\"># GC \u4f1a\u611f\u77e5\u8fd9\u4e2a\u9650\u5236<\/span><br \/>\n    <span class=\"token key atrule\">cpu<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;1000m&#034;<\/span><\/p>\n<h4>7.4 \u76d1\u63a7\u544a\u8b66\u9608\u503c\u5efa\u8bae<\/h4>\n<p><span class=\"token comment\">\/\/ \u57fa\u4e8e dotnet-counters \u6307\u6807\u7684\u544a\u8b66\u89c4\u5219<\/span><br \/>\n<span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> alertRules <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u6258\u7ba1\u5806\u8d85\u8fc7 limit \u7684 70%<\/span><br \/>\n    GcHeapSizeRatio <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0.70<\/span><span class=\"token punctuation\">,<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ GC \u65f6\u95f4\u5360\u6bd4\u8d85\u8fc7 10%<\/span><br \/>\n    TimeInGcThreshold <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0.10<\/span><span class=\"token punctuation\">,<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ Gen2 GC \u9891\u7387 &gt; 1\u6b21\/\u5206\u949f<\/span><br \/>\n    Gen2GcRatePerMinute <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ LOH \u5927\u5c0f\u8d85\u8fc7\u6258\u7ba1\u5806\u7684 30%<\/span><br \/>\n    LohRatioThreshold <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0.30<\/span><span class=\"token punctuation\">,<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u5de5\u4f5c\u96c6\u4e0e\u6258\u7ba1\u5806\u5dee\u5f02\u8d85\u8fc7 500MB&#xff08;\u53ef\u80fd\u7684\u975e\u6258\u7ba1\u6cc4\u6f0f&#xff09;<\/span><br \/>\n    WorkingSetGapMB <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">500<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<hr \/>\n<h3>\u516b\u3001.NET 8 \u65b0\u7279\u6027&#xff1a;DMA \u548c DATASG<\/h3>\n<p>.NET 8 \u5f15\u5165\u4e86\u4e24\u4e2a\u91cd\u8981\u7684 GC \u6539\u8fdb&#xff0c;\u5bf9\u751f\u4ea7\u6392\u969c\u5f88\u6709\u5e2e\u52a9&#xff1a;<\/p>\n<h4>8.1 Dynamic Memory Adjustment (DMA)<\/h4>\n<p>GC \u73b0\u5728\u53ef\u4ee5\u6839\u636e\u5e94\u7528\u7684\u5185\u5b58\u9700\u6c42\u52a8\u6001\u8c03\u6574\u5806\u5927\u5c0f&#xff0c;\u5728\u5bb9\u5668\u73af\u5883\u4e2d\u7279\u522b\u6709\u7528&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/ .NET 8 \u4e2d&#xff0c;GC \u4f1a\u81ea\u52a8\u54cd\u5e94\u5bb9\u5668\u5185\u5b58\u9650\u5236\u7684\u53d8\u5316<\/span><br \/>\n<span class=\"token comment\">\/\/ \u65e0\u9700\u624b\u52a8\u914d\u7f6e&#xff0c;\u5347\u7ea7\u5373\u53ef\u53d7\u76ca<\/span><\/p>\n<h4>8.2 DATASG (Dynamic Adaptation To Application Sizes and Generations)<\/h4>\n<p>GC \u6839\u636e\u5e94\u7528\u7684\u5206\u914d\u6a21\u5f0f\u52a8\u6001\u8c03\u6574\u5404\u4ee3\u7684\u9884\u7b97&#xff0c;\u51cf\u5c11\u4e0d\u5fc5\u8981\u7684 Gen2 GC&#xff1a;<\/p>\n<p>\u5347\u7ea7\u524d&#xff08;.NET 6&#xff09;&#xff1a;<br \/>\nGen0 GC: 1200\u6b21\/\u5c0f\u65f6<br \/>\nGen1 GC:  200\u6b21\/\u5c0f\u65f6<br \/>\nGen2 GC:   15\u6b21\/\u5c0f\u65f6  \u2190 \u9891\u7e41<br \/>\nGC\u6682\u505c\u603b\u8ba1: 2.3\u79d2\/\u5206\u949f<\/p>\n<p>\u5347\u7ea7\u540e&#xff08;.NET 8 with DATASG&#xff09;&#xff1a;<br \/>\nGen0 GC: 1100\u6b21\/\u5c0f\u65f6<br \/>\nGen1 GC:  150\u6b21\/\u5c0f\u65f6<br \/>\nGen2 GC:    3\u6b21\/\u5c0f\u65f6  \u2190 \u964d\u4f4e80%<br \/>\nGC\u6682\u505c\u603b\u8ba1: 0.4\u79d2\/\u5206\u949f<\/p>\n<hr \/>\n<h3>\u4e5d\u3001Checklist&#xff1a;\u5185\u5b58\u95ee\u9898\u6392\u67e5\u6d41\u7a0b<\/h3>\n<p>Step 1&#xff1a;\u786e\u8ba4\u95ee\u9898<br \/>\n  \u25a1 dotnet-counters \u89c2\u6d4b working-set vs gc-heap-size<br \/>\n  \u25a1 \u5224\u65ad\u662f\u6258\u7ba1\u6cc4\u6f0f\u8fd8\u662f\u975e\u6258\u7ba1\u6cc4\u6f0f<br \/>\n  \u25a1 \u8bb0\u5f55\u5185\u5b58\u589e\u957f\u901f\u7387\u548c\u590d\u73b0\u65f6\u95f4<\/p>\n<p>Step 2&#xff1a;\u6258\u7ba1\u5185\u5b58\u6cc4\u6f0f<br \/>\n  \u25a1 dotnet-dump collect &#8211;type Full \u6293\u53d6 Dump<br \/>\n  \u25a1 dumpheap -stat \u627e\u6700\u5927\u5bf9\u8c61\u7c7b\u578b<br \/>\n  \u25a1 gcroot &lt;address&gt; \u8ffd\u8e2a\u5f15\u7528\u94fe<br \/>\n  \u25a1 \u91cd\u70b9\u68c0\u67e5&#xff1a;\u9759\u6001\u4e8b\u4ef6\u3001\u9759\u6001\u96c6\u5408\u3001\u672a\u91ca\u653e\u7684 Scope\u3001Timer<br \/>\n  \u25a1 \u68c0\u67e5 finalizequeue \u548c gchandles<\/p>\n<p>Step 3&#xff1a;\u975e\u6258\u7ba1\u5185\u5b58\u6cc4\u6f0f<br \/>\n  \u25a1 gchandles \u67e5\u770b Ref Counted\/Pinned Handles<br \/>\n  \u25a1 finalizequeue \u67e5\u770b\u7ec8\u7ed3\u5316\u961f\u5217<br \/>\n  \u25a1 \u68c0\u67e5 P\/Invoke \u8c03\u7528\u662f\u5426\u90fd\u6709\u5bf9\u5e94\u7684\u91ca\u653e<br \/>\n  \u25a1 \u68c0\u67e5 SafeHandle \u662f\u5426\u6b63\u786e\u5b9e\u73b0 ReleaseHandle<br \/>\n  \u25a1 \u5fc5\u8981\u65f6\u4f7f\u7528 jemalloc\/tcmalloc \u7684 profiling \u5b9a\u4f4d<\/p>\n<p>Step 4&#xff1a;GC \u6027\u80fd\u95ee\u9898<br \/>\n  \u25a1 dotnet-counters \u67e5\u770b time-in-gc<br \/>\n  \u25a1 dotnet-trace \u6293\u53d6 GC \u4e8b\u4ef6<br \/>\n  \u25a1 \u5206\u6790 alloc-rate \u627e\u9ad8\u9891\u5206\u914d\u70b9<br \/>\n  \u25a1 \u68c0\u67e5 LOH \u5927\u5c0f\u548c\u788e\u7247<br \/>\n  \u25a1 \u8003\u8651 ArrayPool\/MemoryPool \u4f18\u5316<\/p>\n<p>Step 5&#xff1a;\u9a8c\u8bc1\u4fee\u590d<br \/>\n  \u25a1 \u90e8\u7f72\u4fee\u590d\u7248\u672c<br \/>\n  \u25a1 \u6301\u7eed\u89c2\u5bdf 24-48 \u5c0f\u65f6<br \/>\n  \u25a1 \u786e\u8ba4\u5185\u5b58\u66f2\u7ebf\u4e3a\u952f\u9f7f\u5f62\u800c\u975e\u6301\u7eed\u4e0a\u5347<br \/>\n  \u25a1 Gen2 GC \u9891\u7387\u548c\u6682\u505c\u65f6\u95f4\u6062\u590d\u6b63\u5e38<\/p>\n<hr \/>\n<h3>\u5341\u3001\u5199\u5728\u6700\u540e<\/h3>\n<p>\u5185\u5b58\u6cc4\u6f0f\u6392\u969c\u7684\u6838\u5fc3\u65b9\u6cd5\u8bba\u53ef\u4ee5\u603b\u7ed3\u4e3a\u4e09\u53e5\u8bdd&#xff1a;<\/p>\n<li>\u5148\u5206\u5c42&#xff0c;\u540e\u5b9a\u4f4d \u2014\u2014 \u6258\u7ba1\u5806\u95ee\u9898\u8fd8\u662f\u975e\u6258\u7ba1\u95ee\u9898&#xff1f;working-set \u548c gc-heap-size \u7684\u5bf9\u6bd4\u662f\u7b2c\u4e00\u5224\u636e\u3002<\/li>\n<li>\u7528 gcroot \u627e\u5f15\u7528\u94fe \u2014\u2014 \u5bf9\u8c61\u4e0d\u4f1a\u51ed\u7a7a\u6d3b\u7740&#xff0c;\u603b\u6709\u4e00\u6761\u4ece GC Root \u5230\u5bf9\u8c61\u7684\u5f15\u7528\u94fe\u3002\u627e\u5230\u5b83&#xff0c;\u5c31\u627e\u5230\u4e86\u6cc4\u6f0f\u6e90\u3002<\/li>\n<li>\u7406\u89e3 GC \u7684&#034;\u951a\u5b9a&#034;\u673a\u5236 \u2014\u2014 \u9759\u6001\u53d8\u91cf\u3001\u4e8b\u4ef6\u8ba2\u9605\u3001\u957f\u751f\u547d\u5468\u671f\u96c6\u5408\u3001\u672a\u505c\u6b62\u7684 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\u4f60\u5728\u751f\u4ea7\u73af\u5883\u9047\u5230\u8fc7\u6700\u8be1\u5f02\u7684\u5185\u5b58\u95ee\u9898\u662f\u4ec0\u4e48&#xff1f;\u662f\u6258\u7ba1\u6cc4\u6f0f\u8fd8\u662f\u975e\u6258\u7ba1\u6cc4\u6f0f&#xff1f;\u82b1\u4e86\u591a\u4e45\u5b9a\u4f4d\u5230\u6839\u56e0&#xff1f;\u6b22\u8fce\u5728\u8bc4\u8bba\u533a\u5206\u4eab\u4f60\u7684\u6392\u969c\u6545\u4e8b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f60\u662f\u5426\u7ecf\u5386\u8fc7\u8fd9\u6837\u7684\u6df1\u591c\u544a\u8b66&#xff1a;\u670d\u52a1\u521a\u4e0a\u7ebf\u65f6\u5185\u5b58\u5360\u7528 200MB&#xff0c;\u4e09\u5929\u540e\u6da8\u5230 2GB&#xff0c;\u4e00\u5468\u540e OOM \u88ab Kubernetes \u6740\u6389\u91cd\u542f&#xff1f;\u65e5\u5fd7\u91cc\u6ca1\u6709\u4efb\u4f55 Exception&#xff0c;\u53ea\u6709\u4e00\u884c\u51b0\u51b7\u7684 Killed process 1234 (dotnet) total-vm:3245678kB\u3002<br \/>\n\u5185\u5b58\u95ee\u9898\u662f .NET 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