{"id":64119,"date":"2026-01-22T19:48:33","date_gmt":"2026-01-22T11:48:33","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/64119.html"},"modified":"2026-01-22T19:48:33","modified_gmt":"2026-01-22T11:48:33","slug":"jvm%e7%af%874%e8%af%a6%e8%a7%a3jvm%e8%b0%83%e4%bc%98%e4%b8%8e%e7%bb%8f%e5%85%b8%e6%a1%88%e4%be%8b%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/64119.html","title":{"rendered":"JVM\u7bc74:\u8be6\u89e3JVM\u8c03\u4f18\u4e0e\u7ecf\u5178\u6848\u4f8b\u5206\u6790"},"content":{"rendered":"<p>\u5728 Java \u540e\u7aef\u5f00\u53d1\u4e2d&#xff0c;JVM \u8c03\u4f18\u5f80\u5f80\u88ab\u89c6\u4e3a\u201c\u9ed1\u9b54\u6cd5\u201d\u6216\u201c\u9ad8\u7ea7\u6280\u80fd\u201d\u3002\u5f88\u591a\u540c\u5b66\u5728\u9762\u8bd5\u4e2d\u80fd\u80cc\u8bf5\u53c2\u6570&#xff0c;\u4f46\u9047\u5230\u7ebf\u4e0a OOM \u6216\u5361\u987f\u65f6\u5374\u65e0\u4ece\u4e0b\u624b\u3002<\/p>\n<p>\u672c\u6587\u5c06\u5265\u79bb\u590d\u6742\u7684\u672f\u8bed\u5916\u58f3&#xff0c;\u4ece\u6700\u57fa\u7840\u7684 GC \u5b9a\u4e49\u8bb2\u8d77&#xff0c;\u901a\u8fc7\u4e09\u4e2a\u771f\u5b9e\u7684\u5927\u5382\u751f\u4ea7\u6848\u4f8b&#xff0c;\u5e26\u4f60\u7406\u89e3\u4e3a\u4ec0\u4e48\u8981\u8c03\u4f18\u3001\u600e\u4e48\u8c03\u4f18\u3002<\/p>\n<h3>\u4e00\u3001 \u5fc5\u77e5\u5fc5\u4f1a&#xff1a;\u6838\u5fc3\u80cc\u666f\u77e5\u8bc6<\/h3>\n<p>\u5728\u8c08\u201c\u8c03\u4f18\u201d\u4e4b\u524d&#xff0c;\u6211\u4eec\u5fc5\u987b\u5148\u5bf9\u9f50\u51e0\u4e2a\u6838\u5fc3\u6982\u5ff5\u3002JVM \u7684\u5185\u5b58\u533a\u57df\u5c31\u50cf\u4e00\u4e2a\u5de8\u5927\u7684\u4ed3\u5e93&#xff0c;\u800c\u5783\u573e\u56de\u6536\u5668&#xff08;GC&#xff09;\u5c31\u662f\u4e0d\u77e5\u75b2\u5026\u7684\u4fdd\u6d01\u5458\u3002<\/p>\n<h4>1. \u5783\u573e\u56de\u6536\u7684\u51e0\u79cd\u59ff\u52bf<\/h4>\n<ul>\n<li>\n<p>Young GC (YGC \/ Minor GC)<\/p>\n<ul>\n<li>\n<p>\u5b9a\u4e49&#xff1a;\u53ea\u6e05\u7406\u5e74\u8f7b\u4ee3 (Young Gen) \u7684\u5783\u573e\u56de\u6536\u3002<\/p>\n<\/li>\n<li>\n<p>\u7279\u70b9&#xff1a;\u53d1\u751f\u7684\u975e\u5e38\u9891\u7e41&#xff0c;\u901f\u5ea6\u4e5f\u5f88\u5feb\u3002\u56e0\u4e3a\u5e74\u8f7b\u4ee3\u7684\u5bf9\u8c61\u5927\u591a\u662f\u201c\u671d\u751f\u5915\u6b7b\u201d\u7684&#xff08;\u5982 HTTP \u8bf7\u6c42\u4e2d\u7684\u4e34\u65f6\u5bf9\u8c61&#xff09;\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>Old GC (Major GC)<\/p>\n<ul>\n<li>\n<p>\u5b9a\u4e49&#xff1a;\u53ea\u6e05\u7406\u8001\u5e74\u4ee3 (Old Gen) \u7684\u5783\u573e\u56de\u6536\u3002<\/p>\n<\/li>\n<li>\n<p>\u6ce8\u610f&#xff1a;\u53ea\u6709 CMS \u6536\u96c6\u5668\u4f1a\u6709\u5355\u72ec\u7684 Old GC \u9636\u6bb5\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>Full GC<\/p>\n<ul>\n<li>\n<p>\u5b9a\u4e49&#xff1a;\u201c\u5168\u573a\u5927\u626b\u9664\u201d\u3002\u5b83\u4f1a\u540c\u65f6\u6e05\u7406 \u5e74\u8f7b\u4ee3 &#043; \u8001\u5e74\u4ee3 &#043; \u65b9\u6cd5\u533a&#xff08;\u5143\u7a7a\u95f4&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>\u7279\u70b9&#xff1a;\u5b83\u662f\u6211\u4eec\u8c03\u4f18\u7684\u201c\u5934\u53f7\u654c\u4eba\u201d\u3002\u56e0\u4e3a\u6d89\u53ca\u8303\u56f4\u592a\u5e7f&#xff0c;\u901a\u5e38\u4f1a\u5bfc\u81f4\u957f\u65f6\u95f4\u7684 STW (Stop The World)&#xff0c;\u5373\u5168\u573a\u6682\u505c&#xff0c;\u4e1a\u52a1\u505c\u6446\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>Serial Old<\/p>\n<ul>\n<li>\n<p>\u5b9a\u4e49&#xff1a;\u6700\u53e4\u8001\u7684\u3001\u5355\u7ebf\u7a0b\u7684\u5783\u573e\u56de\u6536\u5668&#xff0c;\u91c7\u7528 \u6807\u8bb0-\u6574\u7406 \u7b97\u6cd5\u3002<\/p>\n<\/li>\n<li>\n<p>\u5730\u4f4d&#xff1a;\u5b83\u662f CMS \u548c G1&#xff08;JDK8&#xff09;\u7684\u515c\u5e95\u65b9\u6848\u3002\u5f53\u8fd9\u4e9b\u5148\u8fdb\u7684\u5e76\u53d1\u6536\u96c6\u5668\u201c\u641e\u4e0d\u5b9a\u201d\u65f6&#xff08;\u6bd4\u5982\u5185\u5b58\u788e\u7247\u592a\u591a\u3001\u5206\u914d\u5931\u8d25&#xff09;&#xff0c;JVM \u4f1a\u5f3a\u5236\u9000\u5316\u4e3a Serial Old&#xff0c;\u5355\u7ebf\u7a0b\u6162\u6162\u6574\u7406\u5185\u5b58\u3002\u8fd9\u662f\u7cfb\u7edf\u5361\u6b7b\u7684\u4e3b\u8981\u539f\u56e0\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>2. \u4ec0\u4e48\u662f JVM \u8c03\u4f18&#xff1f;<\/h4>\n<p>\u6240\u8c13\u7684\u8c03\u4f18&#xff0c;\u5e76\u4e0d\u662f\u53bb\u4fee\u6539 Java \u4ee3\u7801\u903b\u8f91&#xff0c;\u800c\u662f\u901a\u8fc7\u8c03\u6574 JVM \u7684\u542f\u52a8\u53c2\u6570&#xff0c;\u6765\u5e73\u8861\u5185\u5b58\u7a7a\u95f4\u4e0e\u54cd\u5e94\u65f6\u95f4\u3002<\/p>\n<p>\u6211\u4eec\u624b\u91cc\u80fd\u8c03\u8282\u7684\u201c\u65cb\u94ae\u201d\u4e3b\u8981\u5305\u62ec&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u5b9a\u5730\u76d8&#xff1a;\u5806\u5185\u5b58\u5927\u5c0f (-Xms, -Xmx)\u3002<\/p>\n<\/li>\n<li>\n<p>\u5206\u6bd4\u4f8b&#xff1a;\u5e74\u8f7b\u4ee3\/\u8001\u5e74\u4ee3\u6bd4\u4f8b (-XX:NewRatio)&#xff0c;Eden\/Survivor \u6bd4\u4f8b (-XX:SurvivorRatio)\u3002<\/p>\n<\/li>\n<li>\n<p>\u9009\u5de5\u5177&#xff1a;\u6307\u5b9a\u4f7f\u7528\u54ea\u79cd\u56de\u6536\u5668&#xff08;CMS, G1, ZGC \u7b49&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>\u5b9a\u76ee\u6807&#xff1a;\u8bbe\u7f6e\u6700\u5927\u505c\u987f\u65f6\u95f4 (-XX:MaxGCPauseMillis&#xff0c;G1 \u4e13\u7528)\u3002<\/p>\n<\/li>\n<\/ul>\n<h4>3. \u4e3a\u4ec0\u4e48\u8981\u8c03\u4f18&#xff1f;<\/h4>\n<p>JVM \u9ed8\u8ba4\u53c2\u6570\u662f\u901a\u7528\u7684&#xff0c;\u4f46\u4e1a\u52a1\u573a\u666f\u662f\u591a\u53d8\u7684\u3002\u4e0d\u505a\u8c03\u4f18&#xff0c;\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4ee5\u4e0b\u95ee\u9898&#xff1a;<\/p>\n<li>\n<p>Eden \u533a\u592a\u5c0f&#xff1a;\u5bfc\u81f4 Young GC \u6781\u5176\u9891\u7e41&#xff0c;\u4e1a\u52a1\u541e\u5410\u91cf\u4e0b\u964d\u3002<\/p>\n<\/li>\n<li>\n<p>Survivor \u533a\u592a\u5c0f&#xff1a;\u5bfc\u81f4\u5bf9\u8c61\u8fc7\u65e9\u201c\u5077\u6e21\u201d\u5230\u8001\u5e74\u4ee3&#xff0c;\u8bf1\u53d1 Full GC\u3002<\/p>\n<\/li>\n<li>\n<p>Full GC \u9891\u7e41&#xff1a;\u8001\u5e74\u4ee3\u5806\u79ef\u4e86\u592a\u591a\u672c\u8be5\u6b7b\u5728\u5e74\u8f7b\u4ee3\u7684\u5bf9\u8c61&#xff0c;\u5bfc\u81f4\u7cfb\u7edf\u7ecf\u5e38\u6027\u5361\u987f\u3002<\/p>\n<\/li>\n<p>\u8c03\u4f18\u7684\u6838\u5fc3\u76ee\u7684\u53ea\u6709\u4e24\u4e2a&#xff1a;<\/p>\n<li>\n<p>\u541e\u5410\u91cf\u4f18\u5148&#xff1a;\u8ba9 CPU \u66f4\u591a\u65f6\u95f4\u5728\u5e72\u4e1a\u52a1&#xff0c;\u800c\u4e0d\u662f\u5728\u6536\u5783\u573e\u3002<\/p>\n<\/li>\n<li>\n<p>\u54cd\u5e94\u65f6\u95f4\u4f18\u5148&#xff1a;\u6781\u529b\u907f\u514d Full GC&#xff0c;\u7f29\u77ed STW \u65f6\u95f4&#xff0c;\u4e0d\u8ba9\u7528\u6237\u611f\u89c9\u5230\u5361\u3002<\/p>\n<\/li>\n<h4>4.\u00a0\u4ec0\u4e48\u662f\u541e\u5410\u91cf (Throughput)&#xff1f;<\/h4>\n<p>\u5728 JVM \u7684\u8bed\u5883\u4e0b&#xff0c;\u541e\u5410\u91cf\u7684\u5b9a\u4e49\u975e\u5e38\u786c\u6838&#xff1a;<\/p>\n<p>\u541e\u5410\u91cf &#061; ( \u7528\u6237\u4ee3\u7801\u8fd0\u884c\u65f6\u95f4 ) \/ ( \u7528\u6237\u4ee3\u7801\u8fd0\u884c\u65f6\u95f4 &#043; \u5783\u573e\u56de\u6536\u65f6\u95f4 )<\/p>\n<p>\u7b80\u5355\u6765\u8bf4&#xff1a;<span style=\"color:#fe2c24\">\u541e\u5410\u91cf\u5c31\u662f<\/span><span style=\"color:#fe2c24\">CPU \u5728\u5355\u4f4d\u65f6\u95f4\u5185&#xff0c;\u6709\u591a\u5c11\u65f6\u95f4\u662f\u5728\u5e72\u6b63\u4e8b&#xff08;\u8dd1\u4e1a\u52a1&#xff09;<\/span>&#xff0c;\u6709\u591a\u5c11\u65f6\u95f4\u662f\u5728\u6478\u9c7c&#xff08;\u6536\u5783\u573e&#xff09;\u3002<\/p>\n<hr \/>\n<h3>\u4e8c\u3001 \u5b9e\u6218\u6f14\u7ec3&#xff1a;\u4ece\u6848\u4f8b\u770b\u8c03\u4f18\u903b\u8f91<\/h3>\n<p>\u5982\u679c\u5728\u9762\u8bd5\u4e2d&#xff0c;\u4f60\u4e0d\u6562\u8bf4\u81ea\u5df1\u4eb2\u81ea\u8c03\u8fc7\u53c2\u6570&#xff0c;\u90a3\u4e48\u6df1\u5165\u7406\u89e3\u4ee5\u4e0b\u4e09\u4e2a\u57fa\u4e8e\u771f\u5b9e\u751f\u4ea7\u73af\u5883\u7684\u6848\u4f8b&#xff0c;\u4e5f\u80fd\u8bc1\u660e\u4f60\u5177\u5907\u8c03\u4f18\u7684\u601d\u7ef4\u3002<\/p>\n<h4>\u6848\u4f8b\u4e00&#xff1a;\u53cd\u76f4\u89c9\u7684\u4f18\u5316\u2014\u2014\u5185\u5b58\u6269\u5927\u4e86&#xff0c;GC \u8017\u65f6\u53cd\u800c\u6ca1\u53d8&#xff1f;&#xff08;\u91cd\u70b9&#xff09;<\/h4>\n<p>(\u6ce8&#xff1a;\u8fd9\u662f\u7ecf\u5178\u7684\u4f4e\u5ef6\u8fdf\u670d\u52a1\u4f18\u5316\u6848\u4f8b)<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"489\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/01\/20260122114832-69720e9073c38.png\" width=\"1111\" \/><\/p>\n<ul>\n<li>\n<p>\u670d\u52a1\u73af\u5883&#xff1a;JDK 8 &#043; ParNew (\u5e74\u8f7b\u4ee3) &#043; CMS (\u8001\u5e74\u4ee3)<\/p>\n<\/li>\n<li>\n<p>\u95ee\u9898\u73b0\u8c61&#xff1a; \u67d0\u4e2a\u5bf9\u5ef6\u8fdf\u8981\u6c42\u6781\u9ad8\u7684\u670d\u52a1&#xff0c;\u76d1\u63a7\u62a5\u8b66\u663e\u793a&#xff1a;<\/p>\n<ul>\n<li>\n<p>Young GC \u6781\u5176\u9891\u7e41&#xff1a;\u6bcf\u5206\u949f\u9ad8\u8fbe 50 \u6b21&#xff0c;\u6bcf\u6b21\u8017\u65f6\u7ea6 25ms\u3002<\/p>\n<\/li>\n<li>\n<p>Old GC \u4e5f\u4e0d\u6d88\u505c&#xff1a;\u6bcf\u9694\u51e0\u5206\u949f\u5c31\u6765\u4e00\u6b21&#xff0c;\u6bcf\u6b21\u8017\u65f6 200ms\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u539f\u56e0\u5206\u6790&#xff1a;<\/p>\n<li>\n<p>\u521d\u59cb\u914d\u7f6e\u95ee\u9898&#xff1a;\u4e3a\u4e86\u8ffd\u6c42 Young GC \u201c\u5feb\u201d&#xff08;\u51cf\u5c11 STW&#xff09;&#xff0c;\u5f00\u53d1\u4eba\u5458\u6545\u610f\u5c06\u5e74\u8f7b\u4ee3\u8bbe\u7f6e\u5f97\u6bd4\u8f83\u5c0f\u3002<\/p>\n<\/li>\n<li>\n<p>\u8fde\u9501\u53cd\u5e94&#xff1a;\u5e74\u8f7b\u4ee3\u592a\u5c0f -&gt; \u4e5f\u5c31\u662f\u76d8\u5b50\u592a\u5c0f&#xff0c;\u5f88\u5feb\u5c31\u88c5\u6ee1\u4e86 -&gt; \u89e6\u53d1 YGC\u3002<\/p>\n<\/li>\n<li>\n<p>\u8fc7\u65e9\u664b\u5347&#xff1a;\u56e0\u4e3a YGC \u9891\u7387\u592a\u9ad8&#xff0c;\u5f88\u591a\u5bf9\u8c61\u8fd8\u6ca1\u6765\u5f97\u53ca\u91ca\u653e&#xff0c;S \u533a\u53ef\u80fd\u4e5f\u653e\u4e0d\u4e0b&#xff0c;\u88ab\u8feb\u63d0\u524d\u664b\u5347\u5230\u4e86\u8001\u5e74\u4ee3\u3002\u8001\u5e74\u4ee3\u4e00\u6ee1&#xff0c;\u5c31\u89e6\u53d1 Old GC\u3002<\/p>\n<\/li>\n<li>\n<p>\u7ed3\u8bba&#xff1a;\u5e74\u8f7b\u4ee3\u592a\u5c0f\u662f\u4e07\u6076\u4e4b\u6e90\u3002<\/p>\n<\/li>\n<\/li>\n<li>\n<p>\u4f18\u5316\u7b56\u7565&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u5c06\u5e74\u8f7b\u4ee3\u5185\u5b58\u6269\u5927\u4e3a\u539f\u6765\u7684 3\u500d\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u4f18\u5316\u6548\u679c&#xff1a;<\/p>\n<ul>\n<li>\n<p>YGC \u9891\u7387\u964d\u4f4e\u4e86 60%&#xff08;\u76d8\u5b50\u5927\u4e86&#xff0c;\u88c5\u6ee1\u7684\u65f6\u95f4\u53d8\u957f\u4e86&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>Old GC \u9891\u7387\u964d\u4e3a\u51e0\u5c0f\u65f6 1 \u6b21&#xff08;\u5bf9\u8c61\u5728\u5e74\u8f7b\u4ee3\u6709\u8db3\u591f\u7684\u65f6\u95f4\u201c\u81ea\u7136\u6b7b\u4ea1\u201d&#xff0c;\u4e0d\u518d\u53bb\u8001\u5e74\u4ee3\u6363\u4e71&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>\u5173\u952e\u70b9&#xff1a;\u5355\u6b21 YGC \u7684\u8017\u65f6\u4ec5\u4ec5\u589e\u52a0\u4e86 5%&#xff08;\u4ece 25ms \u53d8\u6210 26ms \u5de6\u53f3&#xff09;\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u6df1\u5ea6\u539f\u7406\u89e3\u6790&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u5f88\u591a\u4eba\u4f1a\u95ee&#xff1a;\u201c\u5185\u5b58\u6269\u5927 3 \u500d&#xff0c;\u626b\u5730\u65f6\u95f4\u4e0d\u5e94\u8be5\u4e5f\u53d8\u6210 3 \u500d\u5417&#xff1f;\u201d<\/p>\n<\/li>\n<li>\n<p>\u7b54\u6848\u662f\u4e0d\u4f1a\u3002\u56e0\u4e3a\u5e74\u8f7b\u4ee3\u4f7f\u7528\u7684\u662f \u590d\u5236\u7b97\u6cd5\u3002<\/p>\n<\/li>\n<li>\n<p>\u590d\u5236\u7b97\u6cd5\u7684\u8017\u65f6&#xff0c;\u53ea\u53d6\u51b3\u4e8e \u201c\u6d3b\u7740\u7684\u5bf9\u8c61\u6709\u591a\u5c11\u201d&#xff0c;\u800c\u4e0d\u53d6\u51b3\u4e8e \u201c\u5783\u573e\u6709\u591a\u5c11\u201d\u3002<\/p>\n<\/li>\n<li>\n<p>\u6269\u5bb9\u540e&#xff0c;\u867d\u7136\u5783\u573e\u53d8\u591a\u4e86&#xff0c;\u4f46\u5b58\u6d3b\u7684\u5bf9\u8c61\u6570\u91cf\u57fa\u672c\u4e0d\u53d8&#xff08;\u751a\u81f3\u56e0\u4e3a\u5b58\u6d3b\u65f6\u95f4\u591f\u957f&#xff0c;\u6709\u4e9b\u5bf9\u8c61\u76f4\u63a5\u6b7b\u5728 Eden \u4e86&#xff0c;\u4e0d\u7528\u590d\u5236\u4e86&#xff09;\u3002\u6240\u4ee5\u8017\u65f6\u51e0\u4e4e\u6ca1\u53d8&#xff0c;\u4f46\u9891\u7387\u5927\u5e45\u964d\u4f4e\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>\u6848\u4f8b\u4e8c&#xff1a;CMS \u7684\u201c\u788e\u7247\u201d\u4e4b\u6b87\u4e0e\u201c\u534a\u591c\u5077\u88ad\u201d\u6218\u672f<\/h4>\n<p>(\u6ce8&#xff1a;\u8fd9\u662f\u5927\u5382\u5904\u7406 C \u7aef\u6838\u5fc3\u4e1a\u52a1\u7684\u771f\u5b9e\u6848\u4f8b)<\/p>\n<ul>\n<li>\n<p>\u670d\u52a1\u73af\u5883&#xff1a;JDK 8 &#043; ParNew &#043; CMS<\/p>\n<\/li>\n<li>\n<p>\u95ee\u9898\u73b0\u8c61&#xff1a; C \u7aef\u6838\u5fc3\u4e1a\u52a1\u63a5\u53e3&#xff0c;\u5e73\u65f6\u54cd\u5e94\u5f88\u5feb&#xff08;&lt;100ms&#xff09;\u3002\u4f46\u5728\u4e1a\u52a1\u9ad8\u5cf0\u671f&#xff0c;\u670d\u52a1\u5668\u5076\u5c14\u4f1a\u53d1\u751f Full GC&#xff0c;\u8017\u65f6\u751a\u81f3\u8d85\u8fc7 1 \u79d2&#xff0c;\u5bfc\u81f4\u5927\u91cf\u8bf7\u6c42\u8d85\u65f6\u62a5\u9519\u3002<\/p>\n<\/li>\n<li>\n<p>\u539f\u56e0\u5206\u6790&#xff1a;<\/p>\n<li>\n<p>\u7b97\u6cd5\u7f3a\u9677&#xff1a;CMS \u91c7\u7528\u7684\u662f \u201c\u6807\u8bb0-\u6e05\u9664\u201d \u7b97\u6cd5\u3002\u8fd9\u79cd\u7b97\u6cd5\u53ea\u8d1f\u8d23\u6e05\u9664\u5783\u573e&#xff0c;\u4e0d\u8d1f\u8d23\u6574\u7406\u5185\u5b58\u3002<\/p>\n<\/li>\n<li>\n<p>\u788e\u7247\u7d2f\u79ef&#xff1a;\u5c31\u50cf\u5403\u996d\u4e0d\u64e6\u684c\u5b50&#xff0c;\u65f6\u95f4\u4e45\u4e86&#xff0c;\u8001\u5e74\u4ee3\u5168\u662f\u5185\u5b58\u788e\u7247\u3002<\/p>\n<\/li>\n<li>\n<p>\u5206\u914d\u5931\u8d25&#xff1a;\u9ad8\u5cf0\u671f\u7a81\u7136\u6765\u4e86\u5f88\u591a\u5bf9\u8c61&#xff0c;\u8001\u5e74\u4ee3\u867d\u7136\u603b\u7a7a\u95f4\u591f&#xff0c;\u4f46\u627e\u4e0d\u5230\u4e00\u5757\u8fde\u7eed\u7684\u7a7a\u95f4\u6765\u5b58\u653e\u3002JVM \u5224\u5b9a CMS \u5931\u8d25&#xff0c;\u89e6\u53d1 Full GC\u3002<\/p>\n<\/li>\n<\/li>\n<li>\n<p>\u4f18\u5316\u7b56\u7565&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u6218\u672f&#xff1a;\u5728\u4e1a\u52a1\u4f4e\u5cf0\u671f&#xff08;\u4f8b\u5982\u51cc\u6668 4 \u70b9&#xff09;&#xff0c;\u901a\u8fc7\u5b9a\u65f6\u4efb\u52a1\u8c03\u7528 System.gc()\u3002<\/p>\n<\/li>\n<li>\n<p>\u539f\u7406&#xff1a;\u5728 CMS \u6a21\u5f0f\u4e0b&#xff0c;\u89e6\u53d1 Full GC \u4f1a\u9000\u5316\u4e3a Serial Old&#xff08;\u6216\u914d\u7f6e CMS \u8fdb\u884c\u6574\u7406&#xff09;&#xff0c;\u5b83\u4f1a\u4f7f\u7528 \u201c\u6807\u8bb0-\u6574\u7406\u201d \u7b97\u6cd5&#xff0c;\u628a\u5185\u5b58\u788e\u7247\u6574\u7406\u5f97\u5e72\u5e72\u51c0\u51c0\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u4f18\u5316\u6548\u679c&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u6bcf\u5929\u51cc\u6668 4 \u70b9\u201c\u4e3b\u52a8\u201d\u8fdb\u884c\u4e00\u6b21\u5927\u626b\u9664&#xff08;\u8fd9\u65f6\u5019\u6ca1\u7528\u6237&#xff0c;\u5361\u987f\u4e5f\u6ca1\u4e8b&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>\u7b2c\u4e8c\u5929\u767d\u5929\u9ad8\u5cf0\u671f\u65f6&#xff0c;\u5185\u5b58\u662f\u6574\u9f50\u7684&#xff0c;\u57fa\u672c\u4e0d\u518d\u51fa\u73b0 Full GC\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>\u6848\u4f8b\u4e09&#xff1a;G1 \u7684\u201c\u597d\u5fc3\u529e\u574f\u4e8b\u201d<\/h4>\n<ul>\n<li>\n<p>\u670d\u52a1\u73af\u5883&#xff1a;JDK 8 &#043; G1<\/p>\n<\/li>\n<li>\n<p>\u95ee\u9898\u73b0\u8c61&#xff1a; \u670d\u52a1\u5207\u6362\u5230 G1 \u540e&#xff0c;\u53d1\u73b0 Young GC \u9891\u7387\u5f02\u5e38\u9ad8&#xff0c;\u5bfc\u81f4\u6574\u4f53\u541e\u5410\u91cf\u4e0b\u964d\u3002<\/p>\n<\/li>\n<li>\n<p>\u539f\u56e0\u5206\u6790&#xff1a;<\/p>\n<li>\n<p>\u53c2\u6570\u8bef\u7528&#xff1a;\u8fd0\u7ef4\u4e3a\u4e86\u8ffd\u6c42\u6781\u81f4\u4f4e\u5ef6\u8fdf&#xff0c;\u5c06 -XX:MaxGCPauseMillis&#xff08;\u6700\u5927\u6682\u505c\u65f6\u95f4&#xff09;\u8bbe\u7f6e\u5f97\u975e\u5e38\u5c0f&#xff08;\u4f8b\u5982 50ms&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>G1 \u7684\u53cd\u5e94&#xff1a;G1 \u975e\u5e38\u542c\u8bdd&#xff0c;\u4e3a\u4e86\u4fdd\u8bc1 50ms \u5185\u626b\u5b8c&#xff0c;\u5b83\u53ea\u80fd\u62fc\u547d\u7f29\u5c0f\u5e74\u8f7b\u4ee3\u7684\u5927\u5c0f&#xff08;Region \u6570\u91cf\u51cf\u5c11&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>\u6076\u6027\u5faa\u73af&#xff1a;\u5e74\u8f7b\u4ee3\u53d8\u5c0f -&gt; \u5f88\u5feb\u6ee1\u4e86 -&gt; \u75af\u72c2 GC\u3002<\/p>\n<\/li>\n<\/li>\n<li>\n<p>\u4f18\u5316\u7b56\u7565&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u65b9\u6848 A&#xff1a;\u8c03\u5927 -XX:MaxGCPauseMillis&#xff08;\u4f8b\u5982\u6539\u4e3a 200ms&#xff09;&#xff0c;\u7ed9 G1 \u5598\u606f\u7684\u7a7a\u95f4\u3002<\/p>\n<\/li>\n<li>\n<p>\u65b9\u6848 B&#xff1a;\u5c06\u5e74\u8f7b\u4ee3\u5927\u5c0f\u8bbe\u7f6e\u4e3a\u56fa\u5b9a\u503c&#xff0c;\u4e0d\u8ba9 G1 \u81ea\u52a8\u778e\u8c03\u6574\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<h3>\u4e09\u3001 \u603b\u7ed3<\/h3>\n<p>JVM \u8c03\u4f18\u7684\u672c\u8d28&#xff0c;\u5c31\u662f\u4e00\u573a \u201c\u7a7a\u95f4\u6362\u65f6\u95f4\u201d \u6216 \u201c\u9891\u7387\u6362\u5355\u6b21\u8017\u65f6\u201d \u7684\u535a\u5f08\u3002<\/p>\n<li>\n<p>\u4e0d\u8981\u4e3a\u4e86\u8c03\u4f18\u800c\u8c03\u4f18&#xff1a;\u5927\u591a\u6570\u60c5\u51b5\u4e0b&#xff0c;\u9ed8\u8ba4\u53c2\u6570\u914d\u5408\u826f\u597d\u7684\u4ee3\u7801\u8d28\u91cf\u5df2\u7ecf\u8db3\u591f\u3002<\/p>\n<\/li>\n<li>\n<p>\u6838\u5fc3\u76ee\u6807&#xff1a;\u60f3\u5c3d\u4e00\u5207\u529e\u6cd5&#xff0c;\u8ba9\u77ed\u671f\u5b58\u6d3b\u7684\u5bf9\u8c61\u7559\u5728\u5e74\u8f7b\u4ee3&#xff0c;\u4e0d\u8981\u8ba9\u5b83\u4eec\u53bb\u6c61\u67d3\u8001\u5e74\u4ee3\u3002<\/p>\n<\/li>\n<li>\n<p>\u515c\u5e95\u601d\u7ef4&#xff1a;\u7406\u89e3 CMS \u548c G1 \u7684\u9000\u5316\u673a\u5236&#xff08;Serial Old&#xff09;&#xff0c;\u907f\u514d\u5185\u5b58\u788e\u7247\u6216\u62c5\u4fdd\u5931\u8d25\u5bfc\u81f4\u7684\u957f\u65f6\u95f4\u505c\u987f\u3002<\/p>\n<\/li>\n<p>\u638c\u63e1\u4e86\u8fd9\u4e9b\u539f\u7406\u548c\u6848\u4f8b&#xff0c;\u4e0b\u6b21\u9762\u5bf9\u201cJVM \u8c03\u4f18\u201d\u7684\u95ee\u9898\u65f6&#xff0c;\u4f60\u5c31\u80fd\u4ece\u5bb9\u5e94\u5bf9\u4e86\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Java \u540e\u7aef\u5f00\u53d1\u4e2d&#xff0c;JVM \u8c03\u4f18\u5f80\u5f80\u88ab\u89c6\u4e3a\u201c\u9ed1\u9b54\u6cd5\u201d\u6216\u201c\u9ad8\u7ea7\u6280\u80fd\u201d\u3002\u5f88\u591a\u540c\u5b66\u5728\u9762\u8bd5\u4e2d\u80fd\u80cc\u8bf5\u53c2\u6570&#xff0c;\u4f46\u9047\u5230\u7ebf\u4e0a OOM \u6216\u5361\u987f\u65f6\u5374\u65e0\u4ece\u4e0b\u624b\u3002\u672c\u6587\u5c06\u5265\u79bb\u590d\u6742\u7684\u672f\u8bed\u5916\u58f3&#xff0c;\u4ece\u6700\u57fa\u7840\u7684 GC \u5b9a\u4e49\u8bb2\u8d77&#xff0c;\u901a\u8fc7\u4e09\u4e2a\u771f\u5b9e\u7684\u5927\u5382\u751f\u4ea7\u6848\u4f8b&#xff0c;\u5e26\u4f60\u7406\u89e3\u4e3a\u4ec0\u4e48\u8981\u8c03\u4f18\u3001\u600e\u4e48\u8c03\u4f18\u3002\u4e00\u3001 \u5fc5\u77e5\u5fc5\u4f1a&#xff1a;\u6838\u5fc3\u80cc\u666f\u77e5\u8bc6\u5728\u8c08\u201c\u8c03\u4f18\u201d\u4e4b\u524d&#xff0c;\u6211\u4eec\u5fc5\u987b\u5148\u5bf9\u9f50\u51e0\u4e2a\u6838\u5fc3\u6982\u5ff5\u3002JVM \u7684\u5185\u5b58\u533a\u57df\u5c31\u50cf\u4e00\u4e2a\u5de8\u5927\u7684\u4ed3\u5e93&#xff0c;<\/p>\n","protected":false},"author":2,"featured_media":64118,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[426,4040],"topic":[],"class_list":["post-64119","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-jvm"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>JVM\u7bc74:\u8be6\u89e3JVM\u8c03\u4f18\u4e0e\u7ecf\u5178\u6848\u4f8b\u5206\u6790 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, 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