{"id":38933,"date":"2025-05-21T17:38:25","date_gmt":"2025-05-21T09:38:25","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/38933.html"},"modified":"2025-05-21T17:38:25","modified_gmt":"2025-05-21T09:38:25","slug":"jvm-%e6%80%a7%e8%83%bd%e9%97%ae%e9%a2%98%e6%8e%92%e6%9f%a5%e5%ae%9e%e6%88%9810%e8%bf%9e%e5%87%bb","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/38933.html","title":{"rendered":"JVM \u6027\u80fd\u95ee\u9898\u6392\u67e5\u5b9e\u621810\u8fde\u51fb"},"content":{"rendered":"<\/p>\n<h4>&#x1f5c2;\ufe0f \u76ee\u5f55<\/h4>\n<ul>\n<li>\u524d\u8a00&#xff1a;\u7406\u8bba\u638c\u63e1\u53ea\u662f\u8d77\u70b9&#xff0c;\u5b9a\u4f4d\u80fd\u529b\u624d\u662f\u6838\u5fc3<\/li>\n<li>\u5168\u5c40\u6392\u67e5\u6a21\u578b&#xff1a;\u4e09\u6b65\u6cd5<\/li>\n<li>1\ufe0f\u20e3Full GC \u9891\u7e41\u89e6\u53d1&#xff1a;\u8001\u5e74\u4ee3\u538b\u529b\u8fc7\u5927<\/li>\n<li>2\ufe0f\u20e3 OOM \u7206\u70b8&#xff1a;\u5143\u7a7a\u95f4\u6cc4\u6f0f or \u7f13\u5b58\u672a\u6e05\u7406<\/li>\n<li>3\ufe0f\u20e3 CPU \u98d9\u5347\u5374\u4e0d\u662f GC&#xff1a;\u7ebf\u7a0b\u963b\u585e\u6216\u70ed\u65b9\u6cd5\u5931\u63a7<\/li>\n<li>4\ufe0f\u20e3 Redis \u8fde\u63a5\u6c60\u6253\u6ee1&#xff1a;\u5c0f\u95ee\u9898\u5927\u4ee3\u4ef7<\/li>\n<li>5\ufe0f\u20e3 \u6b7b\u9501\u8bca\u65ad&#xff1a;\u5fc5\u5907 jstack \u6b66\u5668<\/li>\n<li>6\ufe0f\u20e3 GC \u6296\u52a8\u4e25\u91cd&#xff1a;\u5e74\u8f7b\u4ee3\u8bbe\u7f6e\u4e0d\u5408\u7406<\/li>\n<li>7\ufe0f\u20e3 \u5806\u5916\u5185\u5b58\u6cc4\u6f0f&#xff1a;\u88ab\u5ffd\u89c6\u7684 DirectBuffer<\/li>\n<li>8\ufe0f\u20e3 JIT \u7f16\u8bd1\u5931\u6548&#xff1a;\u5c0f\u7ec6\u8282\u5927\u74f6\u9888<\/li>\n<li>9\ufe0f\u20e3 GC \u957f\u65f6\u95f4 STW&#xff1a;\u6682\u505c\u65f6\u95f4\u4e0d\u53ef\u63a7<\/li>\n<li>&#x1f51f; \u5de5\u5177\u7ec4\u5408\u5957\u4ef6&#xff1a;\u4e0d\u6b62\u662f\u547d\u4ee4\u66f4\u662f\u7ec4\u5408\u62f3<\/li>\n<li>&#x1f4cc; \u5b9e\u6218\u603b\u7ed3&#xff1a;\u4f60\u8be5\u6784\u5efa\u7684\u4e0d\u662f\u8bb0\u5fc6&#xff0c;\u800c\u662f\u4f53\u7cfb<\/li>\n<li>&#x1f680; \u4e0b\u4e00\u7bc7\u9884\u544a&#xff1a;\u7b2c\u4e5d\u7bc7\u300aJVM \u5373\u65f6\u7f16\u8bd1\u673a\u5236\u8be6\u89e3\u300b<\/li>\n<\/ul>\n<h2>\u524d\u8a00&#xff1a;\u7406\u8bba\u638c\u63e1\u53ea\u662f\u8d77\u70b9&#xff0c;\u5b9a\u4f4d\u80fd\u529b\u624d\u662f\u6838\u5fc3<\/h2>\n<p>\u5982\u679c\u8bf4\u638c\u63e1 JVM \u5185\u5b58\u6a21\u578b\u4e0e GC \u539f\u7406\u662f\u6027\u80fd\u4f18\u5316\u7684\u201c\u57fa\u7840\u4f53\u80fd\u201d&#xff0c;\u90a3\u4e48\u7cfb\u7edf\u6027\u5730\u6392\u67e5 JVM \u6027\u80fd\u74f6\u9888&#xff0c;\u624d\u662f\u771f\u6b63\u80fd\u6253\u786c\u4ed7\u7684\u6838\u5fc3\u80fd\u529b\u3002 \u672c\u6587\u5c06\u7ed3\u5408\u771f\u5b9e\u9879\u76ee\u4e2d\u7684\u6392\u67e5\u573a\u666f&#xff0c;\u901a\u8fc7 10 \u4e2a\u9ad8\u9891\u5b9e\u6218\u95ee\u9898&#xff0c;\u5e2e\u4f60\u7406\u6e05&#xff1a;<\/p>\n<ul>\n<li>\u95ee\u9898\u51fa\u73b0\u7684\u5e95\u5c42\u539f\u7406<\/li>\n<li>\u5982\u4f55\u5229\u7528\u5de5\u5177\u5feb\u901f\u5b9a\u4f4d<\/li>\n<li>\u6392\u67e5\u601d\u8def\u662f\u5426\u4f53\u7cfb\u5316<\/li>\n<li>\u5982\u4f55\u89c4\u907f\u540c\u7c7b\u95ee\u9898\u518d\u6b21\u53d1\u751f<\/li>\n<\/ul>\n<h2>\u5168\u5c40\u6392\u67e5\u6a21\u578b&#xff1a;\u4e09\u6b65\u6cd5<\/h2>\n<p>JVM \u5c42\u6027\u80fd\u95ee\u9898&#xff0c;\u4e00\u822c\u53ef\u62bd\u8c61\u4e3a\u4ee5\u4e0b\u4e09\u6b65\u5206\u6790\u6a21\u578b&#xff1a;<\/p>\n<p>\u25b6 \u73b0\u8c61\u5b9a\u4f4d&#xff1a;\u662f\u5426\u662f GC \/ OOM \/ \u5361\u987f \/ \u6b7b\u9501 \/ CPU \u5f02\u5e38<br \/>\n\u25b6 \u6570\u636e\u91c7\u96c6&#xff1a;jstat\u3001jmap\u3001jstack\u3001GC \u65e5\u5fd7\u3001Arthas \u7b49<br \/>\n\u25b6 \u6839\u56e0\u5206\u6790&#xff1a;\u5185\u5b58\u6cc4\u6f0f&#xff1f;\u7ebf\u7a0b\u963b\u585e&#xff1f;\u8d44\u6e90\u672a\u91ca\u653e&#xff1f;\u914d\u7f6e\u4e0d\u5408\u7406&#xff1f;<\/p>\n<p>\u65e0\u8bba\u4f60\u9762\u5bf9\u7684\u662f\u7ebf\u4e0a\u4e8b\u6545&#xff0c;\u8fd8\u662f\u6162\u8bf7\u6c42\u62a5\u8b66&#xff0c;\u8fd9\u4e2a\u4e09\u6b65\u6cd5\u90fd\u80fd\u8fc5\u901f\u7ec4\u7ec7\u4f60\u7684\u601d\u8def\u3002<\/p>\n<p>\u6027\u80fd\u95ee\u9898 10 \u8fde\u51fb\u5b9e\u6218<\/p>\n<h2>1\ufe0f\u20e3Full GC \u9891\u7e41\u89e6\u53d1&#xff1a;\u8001\u5e74\u4ee3\u538b\u529b\u8fc7\u5927<\/h2>\n<p>\u73b0\u8c61&#xff1a;<\/p>\n<ul>\n<li>\u65e5\u5fd7\u4e2d\u9891\u7e41\u51fa\u73b0 Full GC \u8bb0\u5f55&#xff0c;STW \u505c\u987f\u663e\u8457\u3002<\/li>\n<li>\u5e94\u7528\u54cd\u5e94\u65f6\u95f4\u9aa4\u5347\u3002<\/li>\n<\/ul>\n<p>\u6392\u67e5\u65b9\u5f0f&#xff1a;<\/p>\n<ul>\n<li>jstat -gcutil PID 1000 5 \u67e5\u770b OU&#xff08;Old Used&#xff09;\u5360\u6bd4\u662f\u5426\u6301\u7eed\u9ad8\u4f4d\u3002<\/li>\n<li>\u5206\u6790 GC \u65e5\u5fd7&#xff0c;\u67e5\u770b Full GC \u7684\u89e6\u53d1\u9891\u7387\u4e0e\u8017\u65f6\u3002<\/li>\n<\/ul>\n<p>\u5e38\u89c1\u539f\u56e0&#xff1a;<\/p>\n<ul>\n<li>\u8001\u5e74\u4ee3\u5bf9\u8c61\u8fc7\u591a&#xff0c;\u664b\u5347\u9891\u7e41&#xff08;\u53ef\u8c03\u5927 -XX:SurvivorRatio&#xff09;\u3002<\/li>\n<li>\u5185\u5b58\u56de\u6536\u4e0d\u53ca\u65f6&#xff0c;\u5185\u5b58\u6cc4\u6f0f\u6216\u5927\u5bf9\u8c61\u76f4\u63a5\u8fdb\u5165\u8001\u5e74\u4ee3\u3002<\/li>\n<\/ul>\n<h2>2\ufe0f\u20e3 OOM \u7206\u70b8&#xff1a;\u5143\u7a7a\u95f4\u6cc4\u6f0f or \u7f13\u5b58\u672a\u6e05\u7406<\/h2>\n<p>\u5e38\u89c1\u5f02\u5e38&#xff1a;<\/p>\n<p>java.lang.OutOfMemoryError: Metaspace<\/p>\n<p>\u6216<\/p>\n<p>java.lang.OutOfMemoryError: GC overhead limit exceeded<\/p>\n<p>\u53ef\u80fd\u539f\u56e0&#xff1a;<\/p>\n<ul>\n<li>\u7c7b\u9891\u7e41\u52a0\u8f7d\u5374\u672a\u5378\u8f7d&#xff08;\u5178\u578b\u4e8e SPI \u6216\u52a8\u6001\u751f\u6210\u7c7b\u573a\u666f&#xff0c;\u5982 CGLIB&#xff09;\u3002<\/li>\n<li>\u7f13\u5b58\u672a\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4&#xff0c;\u5806\u6301\u7eed\u81a8\u80c0\u3002<\/li>\n<\/ul>\n<p>\u89e3\u51b3\u5efa\u8bae&#xff1a;<\/p>\n<ul>\n<li>\u589e\u5927\u5143\u7a7a\u95f4&#xff1a;-XX:MaxMetaspaceSize&#061;256m\u3002<\/li>\n<li>\u5bf9\u52a8\u6001\u7c7b\u4f7f\u7528 WeakReference \u6216\u786e\u4fdd\u5378\u8f7d\u6761\u4ef6\u3002<\/li>\n<li>\u5b9a\u671f\u6e05\u7406\u7f13\u5b58&#xff08;\u5982 Guava Cache&#xff09;\u3002<\/li>\n<\/ul>\n<h2>3\ufe0f\u20e3 CPU \u98d9\u5347\u5374\u4e0d\u662f GC&#xff1a;\u7ebf\u7a0b\u963b\u585e\u6216\u70ed\u65b9\u6cd5\u5931\u63a7<\/h2>\n<p>\u73b0\u8c61&#xff1a;<\/p>\n<ul>\n<li>CPU \u5360\u7528\u957f\u671f 100%&#xff0c;GC \u65e5\u5fd7\u65e0\u5f02\u5e38\u3002<\/li>\n<\/ul>\n<p>\u6392\u67e5\u65b9\u5f0f&#xff1a;<\/p>\n<p><span class=\"token function\">top<\/span> -Hp <span class=\"token operator\">&lt;<\/span>pid<span class=\"token operator\">&gt;<\/span>       <span class=\"token comment\"># \u627e\u51fa\u9ad8 CPU \u7ebf\u7a0b<\/span><br \/>\njstack <span class=\"token operator\">&lt;<\/span>pid<span class=\"token operator\">&gt;<\/span>        <span class=\"token comment\"># \u67e5\u770b\u7ebf\u7a0b\u6808<\/span><\/p>\n<p>\u5e38\u89c1\u539f\u56e0&#xff1a;<\/p>\n<ul>\n<li>\u6b7b\u5faa\u73af\u6216\u5927\u91cf\u8ba1\u7b97&#xff08;\u53ef\u5b9a\u4f4d\u70ed\u65b9\u6cd5&#xff09;\u3002<\/li>\n<li>\u9501\u7ade\u4e89\u8fc7\u9ad8&#xff0c;\u7ebf\u7a0b\u9891\u7e41\u963b\u585e\u3002<\/li>\n<\/ul>\n<h2>4\ufe0f\u20e3 Redis \u8fde\u63a5\u6c60\u6253\u6ee1&#xff1a;\u5c0f\u95ee\u9898\u5927\u4ee3\u4ef7<\/h2>\n<p>\u73b0\u8c61&#xff1a;<\/p>\n<ul>\n<li>\u5e94\u7528\u54cd\u5e94\u8d85\u65f6&#xff0c;\u7ebf\u7a0b\u5806\u6808\u663e\u793a\u963b\u585e\u5728 redis.getConnection()\u3002<\/li>\n<\/ul>\n<p>\u539f\u56e0\u5256\u6790&#xff1a;<\/p>\n<ul>\n<li>\u8fde\u63a5\u6c60\u9ed8\u8ba4\u914d\u7f6e\u8fc7\u5c0f\u3002<\/li>\n<li>\u672a\u6b63\u786e\u5173\u95ed\u8fde\u63a5&#xff0c;\u8d44\u6e90\u6cc4\u6f0f\u3002<\/li>\n<\/ul>\n<p>\u4f18\u5316\u5efa\u8bae&#xff1a;<\/p>\n<ul>\n<li>\u589e\u5927\u8fde\u63a5\u6c60&#xff1a;maxTotal\u3001maxIdle\u3002<\/li>\n<li>\u4f7f\u7528 try-with-resource \u81ea\u52a8\u5173\u95ed\u8fde\u63a5\u3002<\/li>\n<\/ul>\n<h2>5\ufe0f\u20e3 \u6b7b\u9501\u8bca\u65ad&#xff1a;\u5fc5\u5907 jstack \u6b66\u5668<\/h2>\n<p>jstack <span class=\"token operator\">&lt;<\/span>pid<span class=\"token operator\">&gt;<\/span> <span class=\"token operator\">|<\/span> <span class=\"token function\">grep<\/span> -A20 <span class=\"token string\">&#034;Found one Java-level deadlock&#034;<\/span><\/p>\n<p>\u6b7b\u9501\u5178\u578b\u6a21\u5f0f&#xff1a;<\/p>\n<ul>\n<li>A \u7b49 B \u7684\u9501&#xff0c;B \u7b49 A \u7684\u9501\u3002<\/li>\n<li>Synchronized \u548c\u6570\u636e\u5e93\u9501\u6df7\u7528\u573a\u666f\u6700\u5371\u9669\u3002<\/li>\n<\/ul>\n<h2>6\ufe0f\u20e3 GC \u6296\u52a8\u4e25\u91cd&#xff1a;\u5e74\u8f7b\u4ee3\u8bbe\u7f6e\u4e0d\u5408\u7406<\/h2>\n<p>\u73b0\u8c61&#xff1a;<\/p>\n<ul>\n<li>Minor GC \u9891\u7e41&#xff0c;\u6bcf\u6b21\u6682\u505c\u867d\u77ed&#xff0c;\u4f46\u6574\u4f53 TPS \u660e\u663e\u4e0b\u964d\u3002<\/li>\n<\/ul>\n<p>\u68c0\u67e5\u9879&#xff1a;<\/p>\n<ul>\n<li>eden \u533a\u57df\u592a\u5c0f\u3002<\/li>\n<li>Survivor \u533a\u592a\u5c0f&#xff0c;\u5bfc\u81f4\u9891\u7e41\u664b\u5347\u3002<\/li>\n<\/ul>\n<p>\u8c03\u4f18\u5efa\u8bae&#xff1a;<\/p>\n<ul>\n<li>-XX:NewRatio&#061;2 \u63a7\u5236\u65b0\u8001\u5e74\u4ee3\u6bd4\u4f8b\u3002<\/li>\n<li>-XX:SurvivorRatio&#061;6 \u4f18\u5316 Eden \u4e0e Survivor \u6bd4\u4f8b\u3002<\/li>\n<\/ul>\n<h2>7\ufe0f\u20e3 \u5806\u5916\u5185\u5b58\u6cc4\u6f0f&#xff1a;\u88ab\u5ffd\u89c6\u7684 DirectBuffer<\/h2>\n<p>\u5178\u578b\u5f02\u5e38&#xff1a;<\/p>\n<p>java.lang.OutOfMemoryError: Direct buffer memory<\/p>\n<p>\u5e38\u89c1\u539f\u56e0&#xff1a;<\/p>\n<ul>\n<li>Netty\u3001NIO \u5206\u914d\u4e86\u5927\u91cf\u5806\u5916\u5185\u5b58&#xff0c;\u4f46\u672a\u53ca\u65f6\u91ca\u653e\u3002<\/li>\n<\/ul>\n<p>\u5efa\u8bae&#xff1a;<\/p>\n<ul>\n<li>\u8c03\u6574\u5806\u5916\u5185\u5b58\u9650\u5236&#xff1a;-XX:MaxDirectMemorySize<\/li>\n<li>\u5b9a\u671f\u8c03\u7528 System.gc() \u5f3a\u5236\u56de\u6536&#xff08;\u4ec5\u9650\u6d4b\u8bd5&#xff09;\u3002<\/li>\n<\/ul>\n<h2>8\ufe0f\u20e3 JIT \u7f16\u8bd1\u5931\u6548&#xff1a;\u5c0f\u7ec6\u8282\u5927\u74f6\u9888<\/h2>\n<p>\u73b0\u8c61&#xff1a;<\/p>\n<ul>\n<li>\u65b9\u6cd5\u591a\u6b21\u6267\u884c\u4f46\u672a\u89e6\u53d1 JIT \u7f16\u8bd1\u3002<\/li>\n<li>\u7a0b\u5e8f\u70ed\u542f\u52a8\u540e&#xff0c;\u6027\u80fd\u6ca1\u6709\u63d0\u5347\u3002<\/li>\n<\/ul>\n<p>\u8bca\u65ad\u65b9\u5f0f&#xff1a;<\/p>\n<p>-XX:&#043;PrintCompilation<\/p>\n<p>\u53ef\u80fd\u539f\u56e0&#xff1a;<\/p>\n<ul>\n<li>\u65b9\u6cd5\u4f53\u592a\u5927\u3001\u9012\u5f52\u8c03\u7528\u3001\u5f02\u5e38\u5904\u7406\u590d\u6742\u7b49\u3002<\/li>\n<\/ul>\n<h2>9\ufe0f\u20e3 GC \u957f\u65f6\u95f4 STW&#xff1a;\u6682\u505c\u65f6\u95f4\u4e0d\u53ef\u63a7<\/h2>\n<p>\u5178\u578b\u8868\u73b0&#xff1a;<\/p>\n<ul>\n<li>\u4e00\u6b21 GC \u505c\u987f\u8fbe 5s~10s&#xff0c;\u751a\u81f3\u89e6\u53d1\u670d\u52a1\u964d\u7ea7\u3002<\/li>\n<\/ul>\n<p>\u6839\u56e0\u53ef\u80fd\u662f&#xff1a;<\/p>\n<ul>\n<li>CMS GC remark \u9636\u6bb5 STW\u3002<\/li>\n<li>G1 \u7684 Mixed GC \u8c03\u4f18\u4e0d\u8db3\u3002<\/li>\n<\/ul>\n<p>\u5efa\u8bae&#xff1a;<\/p>\n<ul>\n<li>\u5207\u6362\u81f3 ZGC \/ Shenandoah \u8fd9\u7c7b\u4f4e\u6682\u505c\u6536\u96c6\u5668\u3002<\/li>\n<li>\u6216\u901a\u8fc7 -XX:MaxGCPauseMillis \u7cbe\u7ec6\u5316\u914d\u7f6e\u3002<\/li>\n<\/ul>\n<h2>&#x1f51f; \u5de5\u5177\u7ec4\u5408\u5957\u4ef6&#xff1a;\u4e0d\u6b62\u662f\u547d\u4ee4\u66f4\u662f\u7ec4\u5408\u62f3<\/h2>\n<table>\n<tr>\u5de5\u5177\u7528\u9014<\/tr>\n<tbody>\n<tr>\n<td>jstat<\/td>\n<td>\u5b9e\u65f6 GC \u72b6\u6001<\/td>\n<\/tr>\n<tr>\n<td>jmap<\/td>\n<td>\u5bfc\u51fa\u5806 dump\u3001\u7edf\u8ba1 histogram<\/td>\n<\/tr>\n<tr>\n<td>jstack<\/td>\n<td>\u67e5\u770b\u7ebf\u7a0b\u72b6\u6001\u3001\u6b7b\u9501\u6392\u67e5<\/td>\n<\/tr>\n<tr>\n<td>Arthas<\/td>\n<td>\u5728\u7ebf\u8bca\u65ad\u795e\u5668<\/td>\n<\/tr>\n<tr>\n<td>MAT<\/td>\n<td>\u6df1\u5ea6\u5185\u5b58\u5206\u6790\u3001\u6cc4\u6f0f\u8ddf\u8e2a<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&#x1f449; \u5b9e\u6218\u5efa\u8bae&#xff1a;\u914d\u5408\u4f7f\u7528\u624d\u6700\u5f3a\u5927\u3002\u8bca\u65ad\u65f6\u4e0d\u8981\u53ea\u9760\u4e00\u4e2a\u547d\u4ee4&#xff0c;\u8981\u6784\u5efa\u5de5\u5177\u94fe\u4e0e\u6392\u67e5\u8def\u5f84\u3002<\/p>\n<h2>&#x1f4cc; \u5b9e\u6218\u603b\u7ed3&#xff1a;\u4f60\u8be5\u6784\u5efa\u7684\u4e0d\u662f\u8bb0\u5fc6&#xff0c;\u800c\u662f\u4f53\u7cfb<\/h2>\n<p>\u4e0e\u5176\u6b7b\u8bb0\u53c2\u6570\u548c\u73b0\u8c61&#xff0c;\u4e0d\u5982\u638c\u63e1\u80cc\u540e\u7684\u201c\u6392\u67e5\u6a21\u5f0f\u201d\u548c\u201c\u6027\u80fd\u5730\u56fe\u201d&#xff1a;<\/p>\n<ul>\n<li>\u5168\u5c40\u6a21\u578b&#xff1a;\u8d44\u6e90 -&gt; \u914d\u7f6e -&gt; \u884c\u4e3a -&gt; \u62a5\u9519\u3002<\/li>\n<li>\u5de5\u5177\u5206\u5de5&#xff1a;\u5b9e\u65f6\u76d1\u63a7\u3001\u5feb\u7167\u5bfc\u51fa\u3001\u4ee3\u7801\u70ed\u63d2\u62d4\u3002<\/li>\n<li>\u8054\u52a8\u601d\u7ef4&#xff1a;GC \u4e0d\u4e00\u5b9a\u662f\u6839\u56e0&#xff0c;\u53ef\u80fd\u662f\u75c7\u72b6\u3002<\/li>\n<\/ul>\n<p>\u53ea\u8981\u4f60\u6784\u5efa\u51fa\u4e00\u5957\u5c5e\u4e8e\u81ea\u5df1\u7684\u6392\u67e5\u4f53\u7cfb&#xff0c;\u9762\u5bf9\u4efb\u4f55\u7ebf\u4e0a\u95ee\u9898&#xff0c;\u90fd\u4f1a\u66f4\u6709\u5e95\u6c14\u3002<\/p>\n<h2>&#x1f680; \u4e0b\u4e00\u7bc7\u9884\u544a&#xff1a;\u7b2c\u4e5d\u7bc7\u300aJVM \u5373\u65f6\u7f16\u8bd1\u673a\u5236\u8be6\u89e3\u300b<\/h2>\n<p>\u4e0b\u4e00\u7bc7\u6211\u4eec\u5c06\u6df1\u5165\u63a2\u8ba8 JVM \u7684 JIT \u7f16\u8bd1\u539f\u7406&#xff0c;\u5305\u62ec C1\/C2 \u7f16\u8bd1\u5668\u3001\u70ed\u70b9\u63a2\u6d4b\u3001\u9003\u9038\u5206\u6790\u4ee5\u53ca\u751f\u4ea7\u73af\u5883\u5982\u4f55\u8bca\u65ad JIT \u7f16\u8bd1\u5f15\u53d1\u7684\u6027\u80fd\u53d8\u5316\u3002<\/p>\n<p>\u5982\u679c\u4f60\u89c9\u5f97\u8fd9\u7bc7\u6587\u7ae0\u5bf9\u4f60\u6709\u542f\u53d1&#xff0c;\u6b22\u8fce \u70b9\u8d5e&#x1f44d;\u3001\u6536\u85cf\u2b50\u3001\u5173\u6ce8\u2705&#xff0c;\u4f60\u7684\u652f\u6301\u662f\u6211\u6301\u7eed\u66f4\u65b0\u9ad8\u8d28\u91cf JVM \u7cfb\u5217\u7684\u6700\u5927\u52a8\u529b&#xff01;<\/p>\n<p>\u5982\u6709\u5b9e\u9645\u95ee\u9898&#xff0c;\u4e5f\u6b22\u8fce\u8bc4\u8bba\u533a\u4ea4\u6d41&#xff0c;\u6211\u4f1a\u6301\u7eed\u6574\u7406\u5178\u578b\u95ee\u9898\u52a0\u5165\u4e13\u680f&#xff01;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb945\u6b21\uff0c\u70b9\u8d5e22\u6b21\uff0c\u6536\u85cf22\u6b21\u3002\u5982\u679c\u8bf4\u638c\u63e1 JVM \u5185\u5b58\u6a21\u578b\u4e0e GC \u539f\u7406\u662f\u6027\u80fd\u4f18\u5316\u7684\u201c\u57fa\u7840\u4f53\u80fd\u201d\uff0c\u90a3\u4e48\u7cfb\u7edf\u6027\u5730\u6392\u67e5 JVM \u6027\u80fd\u74f6\u9888\uff0c\u624d\u662f\u771f\u6b63\u80fd\u6253\u786c\u4ed7\u7684\u6838\u5fc3\u80fd\u529b\u3002\u95ee\u9898\u51fa\u73b0\u7684\u5e95\u5c42\u539f\u7406\u5982\u4f55\u5229\u7528\u5de5\u5177\u5feb\u901f\u5b9a\u4f4d\u6392\u67e5\u601d\u8def\u662f\u5426\u4f53\u7cfb\u5316\u5982\u4f55\u89c4\u907f\u540c\u7c7b\u95ee\u9898\u518d\u6b21\u53d1\u751f\u5168\u5c40\u6a21\u578b\uff1a\u8d44\u6e90 -&gt; \u914d\u7f6e -&gt; \u884c\u4e3a -&gt; \u62a5\u9519\u3002\u5de5\u5177\u5206\u5de5\uff1a\u5b9e\u65f6\u76d1\u63a7\u3001\u5feb\u7167\u5bfc\u51fa\u3001\u4ee3\u7801\u70ed\u63d2\u62d4\u3002\u8054\u52a8\u601d\u7ef4\uff1aGC 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