{"id":10008166,"date":"2023-08-25T15:00:16","date_gmt":"2023-08-25T07:00:16","guid":{"rendered":"https:\/\/blog.itmax.cn\/?p=10008166"},"modified":"2023-08-25T15:00:16","modified_gmt":"2023-08-25T07:00:16","slug":"%e5%85%ac%e5%8f%b8%e6%9d%a5%e4%ba%86%e4%b8%aa%e5%a4%a7%e4%bd%ac%ef%bc%8c%e6%8a%8a-fullgc-40-%e6%ac%a1-%e5%a4%a9%e4%bc%98%e5%8c%96%e4%b8%ba-10-%e5%a4%a9-1-%e6%ac%a1%ef%bc%8c%e5%a4%aa%e7%a7%80%e4%ba%86","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10008166","title":{"rendered":"\u516c\u53f8\u6765\u4e86\u4e2a\u5927\u4f6c\uff0c\u628a FullGC 40 \u6b21\/\u5929\u4f18\u5316\u4e3a 10 \u5929 1 \u6b21\uff0c\u592a\u79c0\u4e86\uff5e\uff01"},"content":{"rendered":"<p>\u6765\u6e90\uff1a<a target=\"_blank\" href=\"https:\/\/link.segmentfault.com\/?enc=Koii3wlmJxKUHkE2oCae0Q%3D%3D.OgQHwQj5ygg0FcDI8F%2Fz7LM7XSInrHsQ6T09bQFpLql82I%2B%2BeWy0QcftUaMz%2FjUy\" rel=\"noopener noreferrer\">https:\/\/heapdump.cn\/article\/1859160<\/a><\/p>\n<p>\u901a\u8fc7\u8fd9\u4e00\u4e2a\u591a\u6708\u7684\u52aa\u529b\uff0c\u5c06 FullGC \u4ece 40 \u6b21\/\u5929\u4f18\u5316\u5230\u8fd1 10 \u5929\u624d\u89e6\u53d1\u4e00\u6b21\uff0c\u800c\u4e14 YoungGC \u7684\u65f6\u95f4\u4e5f\u51cf\u5c11\u4e86\u4e00\u534a\u4ee5\u4e0a\uff0c\u8fd9\u4e48\u5927\u7684\u4f18\u5316\uff0c\u6709\u5fc5\u8981\u8bb0\u5f55\u4e00\u4e0b\u4e2d\u95f4\u7684\u8c03\u4f18\u8fc7\u7a0b\u3002<\/p>\n<p>\u5bf9\u4e8e JVM \u5783\u573e\u56de\u6536\uff0c\u4e4b\u524d\u4e00\u76f4\u90fd\u662f\u5904\u4e8e\u7406\u8bba\u9636\u6bb5\uff0c\u5c31\u77e5\u9053\u65b0\u751f\u4ee3\uff0c\u8001\u5e74\u4ee3\u7684\u664b\u5347\u5173\u7cfb\uff0c\u8fd9\u4e9b\u77e5\u8bc6\u4ec5\u591f\u5e94\u4ed8\u9762\u8bd5\u4f7f\u7528\u7684\u3002<\/p>\n<p>\u63a8\u8350\u4e00\u4e2a\u5f00\u6e90\u514d\u8d39\u7684 Spring Boot \u5b9e\u6218\u9879\u76ee\uff1a<\/p>\n<blockquote><p><a target=\"_blank\" href=\"https:\/\/link.segmentfault.com\/?enc=im5oJ1f3DnWeT3b6E1F92g%3D%3D.3S1jAEN%2Fl7NQjGAEY1%2B5rcvejLvvfzm4GFZEgA%2BHwm0QtbVdcoE4sqwav1AreVYR9GbrHMuB1RRRm%2BE7zvJhjA%3D%3D\" rel=\"noopener noreferrer\">https:\/\/github.com\/javastacks\/spring-boot-best-practice<\/a><\/p><\/blockquote>\n<h2><strong>\u95ee\u9898<\/strong><\/h2>\n<p>\u524d\u4e00\u6bb5\u65f6\u95f4\uff0c\u7ebf\u4e0a\u670d\u52a1\u5668\u7684 FullGC \u975e\u5e38\u9891\u7e41\uff0c\u5e73\u5747\u4e00\u5929 40 \u591a\u6b21\uff0c\u800c\u4e14\u9694\u51e0\u5929\u5c31\u6709\u670d\u52a1\u5668\u81ea\u52a8\u91cd\u542f\u4e86\uff0c\u8fd9\u8868\u660e\u670d\u52a1\u5668\u7684\u72b6\u6001\u5df2\u7ecf\u975e\u5e38\u4e0d\u6b63\u5e38\u4e86\uff0c\u5f97\u5230\u8fd9\u4e48\u597d\u7684\u673a\u4f1a\uff0c\u5f53\u7136\u8981\u4e3b\u52a8\u8bf7\u6c42\u8fdb\u884c\u8c03\u4f18\u4e86\u3002<\/p>\n<p>\u672a\u8c03\u4f18\u524d\u7684\u670d\u52a1\u5668 GC \u6570\u636e\uff0cFullGC \u975e\u5e38\u9891\u7e41\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"723\" height=\"464\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc9pqU\" alt=\"\" title=\"\"><\/p>\n<p>\u9996\u5148\u670d\u52a1\u5668\u7684\u914d\u7f6e\u975e\u5e38\u4e00\u822c\uff082 \u6838 4G\uff09\uff0c\u603b\u5171 4 \u53f0\u670d\u52a1\u5668\u96c6\u7fa4\u3002\u6bcf\u53f0\u670d\u52a1\u5668\u7684 FullGC \u6b21\u6570\u548c\u65f6\u95f4\u57fa\u672c\u5dee\u4e0d\u591a\u3002\u5176\u4e2d JVM \u51e0\u4e2a\u6838\u5fc3\u7684\u542f\u52a8\u53c2\u6570\u4e3a\uff1a<\/p>\n<pre><code>-Xms1000M -Xmx1800M -Xmn350M -Xss300K -XX:+DisableExplicitGC -XX:SurvivorRatio=4 -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=70 -XX:+CMSParallelRemarkEnabled -XX:LargePageSizeInBytes=128M -XX:+UseFastAccessorMethods -XX:+UseCMSInitiatingOccupancyOnly -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintHeapAtGC<\/code><\/pre>\n<ul>\n<li>-Xmx1800M\uff1a\u8bbe\u7f6e JVM \u6700\u5927\u53ef\u7528\u5185\u5b58\u4e3a 1800M\u3002<\/li>\n<li>-Xms1000m\uff1a\u8bbe\u7f6e JVM \u521d\u59cb\u5316\u5185\u5b58\u4e3a 1000m\u3002\u6b64\u503c\u53ef\u4ee5\u8bbe\u7f6e\u4e0e -Xmx \u76f8\u540c\uff0c\u4ee5\u907f\u514d\u6bcf\u6b21\u5783\u573e\u56de\u6536\u5b8c\u6210\u540e JVM \u91cd\u65b0\u5206\u914d\u5185\u5b58\u3002<\/li>\n<li>-Xmn350M\uff1a\u8bbe\u7f6e\u5e74\u8f7b\u4ee3\u5927\u5c0f\u4e3a 350M\u3002\u6574\u4e2a JVM \u5185\u5b58\u5927\u5c0f = \u5e74\u8f7b\u4ee3\u5927\u5c0f + \u5e74\u8001\u4ee3\u5927\u5c0f\u3002\u589e\u5927\u5e74\u8f7b\u4ee3\u540e\uff0c\u5c06\u4f1a\u51cf\u5c0f\u5e74\u8001\u4ee3\u5927\u5c0f\u3002\u6b64\u503c\u5bf9\u7cfb\u7edf\u6027\u80fd\u5f71\u54cd\u8f83\u5927\uff0cSun \u5b98\u65b9\u63a8\u8350\u914d\u7f6e\u4e3a\u6574\u4e2a\u5806\u7684 3\/8\u3002<\/li>\n<li>-Xss300K\uff1a\u8bbe\u7f6e\u6bcf\u4e2a\u7ebf\u7a0b\u7684\u5806\u6808\u5927\u5c0f\u3002JDK5.0 \u4ee5\u540e\u6bcf\u4e2a\u7ebf\u7a0b\u5806\u6808\u5927\u5c0f\u4e3a 1M\uff0c\u4ee5\u524d\u6bcf\u4e2a\u7ebf\u7a0b\u5806\u6808\u5927\u5c0f\u4e3a 256K\u3002\u6839\u636e\u5e94\u7528\u7684\u7ebf\u7a0b\u6240\u9700\u5185\u5b58\u5927\u5c0f\u8fdb\u884c\u8c03\u6574\u3002\u5728\u76f8\u540c\u7269\u7406\u5185\u5b58\u4e0b\uff0c\u51cf\u5c0f\u8fd9\u4e2a\u503c\u80fd\u751f\u6210\u66f4\u591a\u7684\u7ebf\u7a0b\u3002\u4f46\u662f\u64cd\u4f5c\u7cfb\u7edf\u5bf9\u4e00\u4e2a\u8fdb\u7a0b\u5185\u7684\u7ebf\u7a0b\u6570\u8fd8\u662f\u6709\u9650\u5236\u7684\uff0c\u4e0d\u80fd\u65e0\u9650\u751f\u6210\uff0c\u7ecf\u9a8c\u503c\u5728 3000~5000 \u5de6\u53f3\u3002<\/li>\n<\/ul>\n<h2><strong>\u7b2c\u4e00\u6b21\u4f18\u5316<\/strong><\/h2>\n<p>\u4e00\u770b\u53c2\u6570\uff0c\u9a6c\u4e0a\u89c9\u5f97\u65b0\u751f\u4ee3\u4e3a\u4ec0\u4e48\u8fd9\u4e48\u5c0f\uff0c\u8fd9\u4e48\u5c0f\u7684\u8bdd\u600e\u4e48\u63d0\u9ad8\u541e\u5410\u91cf\uff0c\u800c\u4e14\u4f1a\u5bfc\u81f4 YoungGC \u7684\u9891\u7e41\u89e6\u53d1\uff0c\u5982\u4e0a\u56fe\u7684\u65b0\u751f\u4ee3\u6536\u96c6\u5c31\u8017\u65f6 830s\u3002<\/p>\n<p>\u521d\u59cb\u5316\u5806\u5185\u5b58\u6ca1\u6709\u548c\u6700\u5927\u5806\u5185\u5b58\u4e00\u81f4\uff0c\u67e5\u9605\u4e86\u5404\u79cd\u8d44\u6599\u90fd\u662f\u63a8\u8350\u8fd9\u4e24\u4e2a\u503c\u8bbe\u7f6e\u4e00\u6837\u7684\uff0c\u53ef\u4ee5\u9632\u6b62\u5728\u6bcf\u6b21 GC \u540e\u8fdb\u884c\u5185\u5b58\u91cd\u65b0\u5206\u914d\u3002<\/p>\n<p>\u57fa\u4e8e\u524d\u9762\u7684\u77e5\u8bc6\uff0c\u4e8e\u662f\u8fdb\u884c\u4e86\u7b2c\u4e00\u6b21\u7684\u7ebf\u4e0a\u8c03\u4f18\uff1a\u63d0\u5347\u65b0\u751f\u4ee3\u5927\u5c0f\uff0c\u5c06\u521d\u59cb\u5316\u5806\u5185\u5b58\u8bbe\u7f6e\u4e3a\u6700\u5927\u5185\u5b58\u3002<\/p>\n<pre><code>-Xmn350M -&gt; -Xmn800M\n-XX:SurvivorRatio=4 -&gt; -XX:SurvivorRatio=8\n-Xms1000m -&gt;-Xms1800m<\/code><\/pre>\n<p>\u5c06 SurvivorRatio \u4fee\u6539\u4e3a 8 \u7684\u672c\u610f\u662f\u60f3\u8ba9\u5783\u573e\u5728\u65b0\u751f\u4ee3\u65f6\u5c3d\u53ef\u80fd\u7684\u591a\u88ab\u56de\u6536\u6389\u3002<\/p>\n<p>\u5c31\u8fd9\u6837\u5c06\u914d\u7f6e\u90e8\u7f72\u5230\u7ebf\u4e0a\u4e24\u53f0\u670d\u52a1\u5668\uff08prod\uff0cprod2 \u53e6\u5916\u4e24\u53f0\u4e0d\u53d8\u65b9\u4fbf\u5bf9\u6bd4\uff09\u4e0a\u540e\uff0c\u8fd0\u884c\u4e86 5 \u5929\u540e\uff0c\u89c2\u5bdf GC \u7ed3\u679c\uff0cYoungGC \u51cf\u5c11\u4e86\u4e00\u534a\u4ee5\u4e0a\u7684\u6b21\u6570\uff0c\u65f6\u95f4\u51cf\u5c11\u4e86 400s\uff0c\u4f46\u662f FullGC \u7684\u5e73\u5747\u6b21\u6570\u589e\u52a0\u4e86 41 \u6b21\u3002YoungGC \u57fa\u672c\u7b26\u5408\u9884\u671f\u8bbe\u60f3\uff0c\u4f46\u662f\u8fd9\u4e2a FullGC \u5c31\u5b8c\u5168\u4e0d\u884c\u4e86\u3002<\/p>\n<p><img decoding=\"async\" width=\"723\" height=\"366\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc9pqV\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u5c31\u8fd9\u6837\u7b2c\u4e00\u6b21\u4f18\u5316\u5ba3\u544a\u5931\u8d25\u3002<\/p>\n<h2><strong>\u7b2c\u4e8c\u6b21\u4f18\u5316<\/strong><\/h2>\n<p>\u5728\u4f18\u5316\u7684\u8fc7\u7a0b\u4e2d\uff0c\u6211\u4eec\u7684\u4e3b\u7ba1\u53d1\u73b0\u4e86\u6709\u4e2a\u5bf9\u8c61 T \u5728\u5185\u5b58\u4e2d\u6709\u4e00\u4e07\u591a\u4e2a\u5b9e\u4f8b\uff0c\u800c\u4e14\u8fd9\u4e9b\u5b9e\u4f8b\u5360\u636e\u4e86\u5c06\u8fd1 20M \u7684\u5185\u5b58\u3002\u4e8e\u662f\u6839\u636e\u8fd9\u4e2a bean \u5bf9\u8c61\u7684\u4f7f\u7528\uff0c\u5728\u9879\u76ee\u4e2d\u627e\u5230\u4e86\u539f\u56e0\uff1a\u533f\u540d\u5185\u90e8\u7c7b\u5f15\u7528\u5bfc\u81f4\u7684\uff0c\u4f2a\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre><code>public void doSmthing(T t){\n redis.addListener(new Listener(){\n  public void onTimeout(){\n   if(t.success()){\n    \/\/\u6267\u884c\u64cd\u4f5c\n   }\n  }\n });\n}<\/code><\/pre>\n<p>\u7531\u4e8e listener \u5728\u56de\u8c03\u540e\u4e0d\u4f1a\u8fdb\u884c\u91ca\u653e\uff0c\u800c\u4e14\u56de\u8c03\u662f\u4e2a\u8d85\u65f6\u7684\u64cd\u4f5c\uff0c\u5f53\u67d0\u4e2a\u4e8b\u4ef6\u8d85\u8fc7\u4e86\u8bbe\u5b9a\u7684\u65f6\u95f4\uff081 \u5206\u949f\uff09\u540e\u624d\u4f1a\u8fdb\u884c\u56de\u8c03\uff0c\u8fd9\u6837\u5c31\u5bfc\u81f4\u4e86 T \u8fd9\u4e2a\u5bf9\u8c61\u59cb\u7ec8\u65e0\u6cd5\u56de\u6536\uff0c\u6240\u4ee5\u5185\u5b58\u4e2d\u4f1a\u5b58\u5728\u8fd9\u4e48\u591a\u5bf9\u8c61\u5b9e\u4f8b\u3002<\/p>\n<p>\u901a\u8fc7\u4e0a\u8ff0\u7684\u4f8b\u5b50\u53d1\u73b0\u4e86\u5b58\u5728\u5185\u5b58\u6cc4\u6f0f\u540e\uff0c\u9996\u5148\u5bf9\u7a0b\u5e8f\u4e2d\u7684 error log \u6587\u4ef6\u8fdb\u884c\u6392\u67e5\uff0c\u9996\u5148\u5148\u89e3\u51b3\u6389\u6240\u6709\u7684 error \u4e8b\u4ef6\u3002\u7136\u540e\u518d\u6b21\u53d1\u5e03\u540e\uff0cGC \u64cd\u4f5c\u8fd8\u662f\u57fa\u672c\u4e0d\u53d8\uff0c\u867d\u7136\u89e3\u51b3\u4e86\u4e00\u70b9\u5185\u5b58\u6cc4\u6f0f\u95ee\u9898\uff0c\u4f46\u662f\u53ef\u4ee5\u8bf4\u660e\u6ca1\u6709\u89e3\u51b3\u6839\u672c\u539f\u56e0\uff0c\u670d\u52a1\u5668\u8fd8\u662f\u7ee7\u7eed\u83ab\u540d\u7684\u91cd\u542f\u3002<\/p>\n<h2><strong>\u5185\u5b58\u6cc4\u6f0f\u8c03\u67e5<\/strong><\/h2>\n<p>\u7ecf\u8fc7\u4e86\u7b2c\u4e00\u6b21\u7684\u8c03\u4f18\u540e\u53d1\u73b0\u5185\u5b58\u6cc4\u6f0f\u7684\u95ee\u9898\uff0c\u4e8e\u662f\u5927\u5bb6\u90fd\u5f00\u59cb\u5c06\u8fdb\u884c\u5185\u5b58\u6cc4\u6f0f\u7684\u8c03\u67e5\uff0c\u9996\u5148\u6392\u67e5\u4ee3\u7801\uff0c\u4e0d\u8fc7\u8fd9\u79cd\u6548\u7387\u662f\u86ee\u4f4e\u7684\uff0c\u57fa\u672c\u6ca1\u53d1\u73b0\u95ee\u9898\u3002\u4e8e\u662f\u5728\u7ebf\u4e0a\u4e0d\u662f\u5f88\u7e41\u5fd9\u7684\u65f6\u5019\u7ee7\u7eed\u8fdb\u884c dump \u5185\u5b58\uff0c\u7ec8\u4e8e\u6293\u5230\u4e86\u4e00\u4e2a\u5927\u5bf9\u8c61\u3002<\/p>\n<p><img decoding=\"async\" width=\"723\" height=\"543\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc9pqW\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p><img decoding=\"async\" width=\"723\" height=\"669\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc9pqX\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u8fd9\u4e2a\u5bf9\u8c61\u7adf\u7136\u6709 4W \u591a\u4e2a\uff0c\u800c\u4e14\u90fd\u662f\u6e05\u4e00\u8272\u7684 ByteArrowRow \u5bf9\u8c61\uff0c\u53ef\u4ee5\u786e\u8ba4\u8fd9\u4e9b\u6570\u636e\u662f\u6570\u636e\u5e93\u67e5\u8be2\u6216\u8005\u63d2\u5165\u65f6\u4ea7\u751f\u7684\u4e86\u3002<\/p>\n<p>\u4e8e\u662f\u53c8\u8fdb\u884c\u4e00\u8f6e\u4ee3\u7801\u5206\u6790\uff0c\u5728\u4ee3\u7801\u5206\u6790\u7684\u8fc7\u7a0b\u4e2d\uff0c\u901a\u8fc7\u8fd0\u7ef4\u7684\u540c\u4e8b\u53d1\u73b0\u4e86\u5728\u4e00\u5929\u7684\u67d0\u4e2a\u65f6\u5019\u5165\u53e3\u6d41\u91cf\u7ffb\u4e86\u597d\u51e0\u500d\uff0c\u7adf\u7136\u9ad8\u8fbe 83MB\/s \uff0c\u7ecf\u8fc7\u4e00\u756a\u786e\u8ba4\uff0c\u76ee\u524d\u5b8c\u5168\u6ca1\u6709\u8fd9\u4e48\u5927\u7684\u4e1a\u52a1\u91cf\uff0c\u800c\u4e14\u4e5f\u4e0d\u5b58\u5728\u6587\u4ef6\u4e0a\u4f20\u7684\u529f\u80fd\u3002<\/p>\n<p>\u54a8\u8be2\u4e86\u963f\u91cc\u4e91\u5ba2\u670d\u4e5f\u8bf4\u660e\u5b8c\u5168\u662f\u6b63\u5e38\u7684\u6d41\u91cf\uff0c\u53ef\u4ee5\u6392\u9664\u653b\u51fb\u7684\u53ef\u80fd\u3002<\/p>\n<p><img decoding=\"async\" width=\"723\" height=\"820\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc9pqY\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u5c31\u5728\u6211\u8fd8\u5728\u8c03\u67e5\u5165\u53e3\u6d41\u91cf\u7684\u95ee\u9898\u65f6\uff0c\u53e6\u5916\u4e00\u4e2a\u540c\u4e8b\u627e\u5230\u4e86\u6839\u672c\u7684\u539f\u56e0\uff0c\u539f\u6765\u662f\u5728\u67d0\u4e2a\u6761\u4ef6\u4e0b\uff0c\u4f1a\u67e5\u8be2\u8868\u4e2d\u6240\u6709\u672a\u5904\u7406\u7684\u6307\u5b9a\u6570\u636e\uff0c\u4f46\u662f\u7531\u4e8e\u67e5\u8be2\u7684\u65f6\u5019 where \u6761\u4ef6\u4e2d\u5c11\u52a0\u4e86\u6a21\u5757\u8fd9\u4e2a\u6761\u4ef6\uff0c\u5bfc\u81f4\u67e5\u8be2\u51fa\u7684\u6570\u91cf\u8fbe 40 \u591a\u4e07\u6761\uff0c\u800c\u4e14\u901a\u8fc7 log \u67e5\u770b\u5f53\u65f6\u7684\u8bf7\u6c42\u548c\u6570\u636e\uff0c\u53ef\u4ee5\u5224\u65ad\u8fd9\u4e2a\u903b\u8f91\u786e\u5b9e\u662f\u5df2\u7ecf\u6267\u884c\u4e86\u7684\uff0cdump \u51fa\u7684\u5185\u5b58\u4e2d\u53ea\u6709 4W \u591a\u4e2a\u5bf9\u8c61\uff0c\u8fd9\u4e2a\u662f\u56e0\u4e3a dump \u65f6\u5019\u521a\u597d\u67e5\u8be2\u51fa\u4e86\u8fd9\u4e48\u591a\u4e2a\uff0c\u5269\u4e0b\u7684\u8fd8\u5728\u4f20\u8f93\u4e2d\u5bfc\u81f4\u7684\u3002\u800c\u4e14\u8fd9\u4e5f\u80fd\u975e\u5e38\u597d\u7684\u89e3\u91ca\u4e86\u4e3a\u4ec0\u4e48\u670d\u52a1\u5668\u4f1a\u81ea\u52a8\u91cd\u542f\u7684\u539f\u56e0\u3002<\/p>\n<p>\u89e3\u51b3\u4e86\u8fd9\u4e2a\u95ee\u9898\u540e\uff0c\u7ebf\u4e0a\u670d\u52a1\u5668\u8fd0\u884c\u5b8c\u5168\u6b63\u5e38\u4e86\uff0c\u4f7f\u7528\u672a\u8c03\u4f18\u524d\u7684\u53c2\u6570\uff0c\u8fd0\u884c\u4e86 3 \u5929\u5de6\u53f3 FullGC \u53ea\u6709 5 \u6b21\u3002<\/p>\n<p><img decoding=\"async\" width=\"723\" height=\"444\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc9pqZ\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<h2><strong>\u7b2c\u4e8c\u6b21\u8c03\u4f18<\/strong><\/h2>\n<p>\u5185\u5b58\u6cc4\u6f0f\u7684\u95ee\u9898\u5df2\u7ecf\u89e3\u51b3\u4e86\uff0c\u5269\u4e0b\u7684\u5c31\u53ef\u4ee5\u7ee7\u7eed\u8c03\u4f18\u4e86\uff0c\u7ecf\u8fc7\u67e5\u770b GC log\uff0c\u53d1\u73b0\u524d\u4e09\u6b21 FullGC \u65f6\uff0c\u8001\u5e74\u4ee3\u5360\u636e\u7684\u5185\u5b58\u8fd8\u4e0d\u8db3 30%\uff0c\u5374\u53d1\u751f\u4e86 FullGC\u3002<\/p>\n<p>\u4e8e\u662f\u8fdb\u884c\u5404\u79cd\u8d44\u6599\u7684\u8c03\u67e5\uff0c\u5728 <code>https:\/\/blog.csdn.net\/zjwstz\/article\/details\/77478054<\/code>\u535a\u5ba2\u4e2d\u975e\u5e38\u6e05\u6670\u660e\u4e86\u7684\u8bf4\u660e metaspace \u5bfc\u81f4 FullGC \u7684\u60c5\u51b5\uff0c\u670d\u52a1\u5668\u9ed8\u8ba4\u7684 metaspace \u662f 21M\uff0c\u5728<code>GC log<\/code>\u4e2d\u770b\u5230\u4e86\u6700\u5927\u7684\u65f6\u5019 metaspace \u5360\u636e\u4e86 200M \u5de6\u53f3\uff0c\u4e8e\u662f\u8fdb\u884c\u5982\u4e0b\u8c03\u4f18\uff0c\u4ee5\u4e0b\u5206\u522b\u4e3a prod1 \u548c prod2 \u7684\u4fee\u6539\u53c2\u6570\uff0cprod3\uff0cprod4 \u4fdd\u6301\u4e0d\u53d8\u3002<\/p>\n<pre><code>-Xmn350M -&gt; -Xmn800M\n-Xms1000M -&gt;1800M\n-XX:MetaspaceSize=200M\n-XX:CMSInitiatingOccupancyFraction=75<\/code><\/pre>\n<p>\u548c<\/p>\n<pre><code>-Xmn350M -&gt; -Xmn600M\n-Xms1000M -&gt;1800M\n-XX:MetaspaceSize=200M\n-XX:CMSInitiatingOccupancyFraction=75<\/code><\/pre>\n<p>prod1 \u548c 2 \u53ea\u662f\u65b0\u751f\u4ee3\u5927\u5c0f\u4e0d\u4e00\u6837\u800c\u5df2\uff0c\u5176\u4ed6\u7684\u90fd\u4e00\u81f4\u3002\u5230\u7ebf\u4e0a\u8fd0\u884c\u4e86 10 \u5929\u5de6\u53f3\uff0c\u8fdb\u884c\u5bf9\u6bd4\uff1a<\/p>\n<p>prod1\uff1a<\/p>\n<p><img decoding=\"async\" width=\"723\" height=\"444\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc9pq0\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>prod2\uff1a<\/p>\n<p><img decoding=\"async\" width=\"723\" height=\"466\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc9pq1\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>prod3\uff1a<\/p>\n<p><img decoding=\"async\" width=\"723\" height=\"470\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc9pq2\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>prod4\uff1a<\/p>\n<p><img decoding=\"async\" width=\"723\" height=\"456\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc9pq3\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u5bf9\u6bd4\u6765\u8bf4\uff0c1\uff0c2 \u4e24\u53f0\u670d\u52a1\u5668 FullGC \u8fdc\u8fdc\u4f4e\u4e8e 3\uff0c4 \u4e24\u53f0\uff0c\u800c\u4e14 1\uff0c2 \u4e24\u53f0\u670d\u52a1\u5668\u7684 YounGC \u5bf9\u6bd4 3\uff0c4 \u4e5f\u51cf\u5c11\u4e86\u4e00\u534a\u5de6\u53f3\u3002<\/p>\n<p>\u800c\u4e14\u7b2c\u4e00\u53f0\u670d\u52a1\u5668\u6548\u7387\u66f4\u4e3a\u660e\u663e\uff0c\u9664\u4e86 YoungGC \u6b21\u6570\u51cf\u5c11\uff0c\u800c\u4e14\u541e\u5410\u91cf\u6bd4\u591a\u8fd0\u884c\u4e86\u4e00\u5929\u7684 3\uff0c4 \u4e24\u53f0\u7684\u90fd\u8981\u591a\uff08\u901a\u8fc7\u7ebf\u7a0b\u542f\u52a8\u6570\u91cf\uff09\uff0c\u8bf4\u660e prod1 \u7684\u541e\u5410\u91cf\u63d0\u5347\u5c24\u4e3a\u660e\u663e\u3002<\/p>\n<p>\u901a\u8fc7 GC \u7684\u6b21\u6570\u548c GC \u7684\u65f6\u95f4\uff0c\u672c\u6b21\u4f18\u5316\u5ba3\u544a\u6210\u529f\uff0c\u4e14 prod1 \u7684\u914d\u7f6e\u66f4\u4f18\uff0c\u6781\u5927\u63d0\u5347\u4e86\u670d\u52a1\u5668\u7684\u541e\u5410\u91cf\u548c\u964d\u4f4e\u4e86 GC \u4e00\u534a\u4ee5\u4e0a\u7684\u65f6\u95f4\u3002<\/p>\n<p>prod1 \u4e2d\u7684\u552f\u4e00\u4e00\u6b21 FullGC\uff1a<\/p>\n<p><img decoding=\"async\" width=\"723\" height=\"224\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVcTogo\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p><img decoding=\"async\" width=\"723\" height=\"262\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc9pq4\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u901a\u8fc7 GC log \u4e0a\u4e5f\u6ca1\u770b\u51fa\u539f\u56e0\uff0c\u8001\u5e74\u4ee3\u5728 cms remark \u7684\u65f6\u5019\u53ea\u5360\u636e\u4e86 660M \u5de6\u53f3\uff0c\u8fd9\u4e2a\u5e94\u8be5\u8fd8\u4e0d\u5230\u89e6\u53d1 FullGC \u7684\u6761\u4ef6\uff0c\u800c\u4e14\u901a\u8fc7\u524d\u51e0\u6b21\u7684 YoungGC \u8c03\u67e5\uff0c\u4e5f\u6392\u9664\u4e86\u664b\u5347\u4e86\u5927\u5185\u5b58\u5bf9\u8c61\u7684\u53ef\u80fd\uff0c\u901a\u8fc7 metaspace \u7684\u5927\u5c0f\uff0c\u4e5f\u6ca1\u6709\u8fbe\u5230 GC \u7684\u6761\u4ef6\u3002\u8fd9\u4e2a\u8fd8\u9700\u8981\u7ee7\u7eed\u8c03\u67e5\uff0c\u6709\u77e5\u9053\u7684\u6b22\u8fce\u6307\u51fa\u4e0b\uff0c\u8fd9\u91cc\u5148\u884c\u8c22\u8fc7\u4e86\u3002<\/p>\n<h2><strong>\u603b\u7ed3<\/strong><\/h2>\n<p>\u901a\u8fc7\u8fd9\u4e00\u4e2a\u591a\u6708\u7684\u8c03\u4f18\u603b\u7ed3\u51fa\u4ee5\u4e0b\u51e0\u70b9\uff1a<\/p>\n<ul>\n<li>FullGC \u4e00\u5929\u8d85\u8fc7\u4e00\u6b21\u80af\u5b9a\u5c31\u4e0d\u6b63\u5e38\u4e86\u3002<\/li>\n<li>\u53d1\u73b0 FullGC \u9891\u7e41\u7684\u65f6\u5019\u4f18\u5148\u8c03\u67e5\u5185\u5b58\u6cc4\u6f0f\u95ee\u9898\u3002<\/li>\n<li>\u5185\u5b58\u6cc4\u6f0f\u89e3\u51b3\u540e\uff0cjvm \u53ef\u4ee5\u8c03\u4f18\u7684\u7a7a\u95f4\u5c31\u6bd4\u8f83\u5c11\u4e86\uff0c\u4f5c\u4e3a\u5b66\u4e60\u8fd8\u53ef\u4ee5\uff0c\u5426\u5219\u4e0d\u8981\u6295\u5165\u592a\u591a\u7684\u65f6\u95f4\u3002<\/li>\n<li>\u5982\u679c\u53d1\u73b0 CPU \u6301\u7eed\u504f\u9ad8\uff0c\u6392\u9664\u4ee3\u7801\u95ee\u9898\u540e\u53ef\u4ee5\u627e\u8fd0\u7ef4\u54a8\u8be2\u4e0b\u963f\u91cc\u4e91\u5ba2\u670d\uff0c\u8fd9\u6b21\u8c03\u67e5\u8fc7\u7a0b\u4e2d\u5c31\u53d1\u73b0 CPU 100% \u662f\u7531\u4e8e\u670d\u52a1\u5668\u95ee\u9898\u5bfc\u81f4\u7684\uff0c\u8fdb\u884c\u670d\u52a1\u5668\u8fc1\u79fb\u540e\u5c31\u6b63\u5e38\u4e86\u3002<\/li>\n<li>\u6570\u636e\u67e5\u8be2\u7684\u65f6\u5019\u4e5f\u662f\u7b97\u4f5c\u670d\u52a1\u5668\u7684\u5165\u53e3\u6d41\u91cf\u7684\uff0c\u5982\u679c\u8bbf\u95ee\u4e1a\u52a1\u6ca1\u6709\u8fd9\u4e48\u5927\u91cf\uff0c\u800c\u4e14\u6ca1\u6709\u653b\u51fb\u7684\u95ee\u9898\u7684\u8bdd\u53ef\u4ee5\u5f80\u6570\u636e\u5e93\u65b9\u9762\u8c03\u67e5\u3002<\/li>\n<li>\u6709\u5fc5\u8981\u65f6\u5e38\u5173\u6ce8\u670d\u52a1\u5668\u7684 GC\uff0c\u53ef\u4ee5\u53ca\u65e9\u53d1\u73b0\u95ee\u9898\u3002<\/li>\n<\/ul>\n<p><strong>\u8fd1\u671f\u70ed\u6587\u63a8\u8350\uff1a<\/strong><\/p>\n<p>1.<a target=\"_blank\" href=\"https:\/\/link.segmentfault.com\/?enc=VGU6zPs1qMCJADo3mKcIQA%3D%3D.uzJsPCz49AeXG0oJ4WLAZ%2Bqvk90DDG1AdH%2BuasVTEBY%3D\" rel=\"noopener noreferrer\">1,000+ \u9053 Java\u9762\u8bd5\u9898\u53ca\u7b54\u6848\u6574\u7406(2022\u6700\u65b0\u7248)<\/a><\/p>\n<p>2.<a target=\"_blank\" href=\"https:\/\/link.segmentfault.com\/?enc=BrAAP9GNZJikG1ue5bUebw%3D%3D.YhXlZTsS7v%2FCxqJEKPwXJFkfFsau%2BBj%2FX%2F3Hs%2BOGF427pb9Zy%2BkquQggHN6dRpBAckD53WHe%2FpbvNJvSVp%2BwhA%3D%3D\" rel=\"noopener noreferrer\">\u52b2\u7206\uff01Java \u534f\u7a0b\u8981\u6765\u4e86\u3002\u3002\u3002<\/a><\/p>\n<p>3.<a target=\"_blank\" href=\"https:\/\/link.segmentfault.com\/?enc=n6qA4%2BYVaLp4%2B5h%2BdwuVBQ%3D%3D.Fwy7mdtuObrrhixvunxk3qvX7NWNyggLh89AcYHZjXvBZ%2BqOdGKan9mueicGUehk\" rel=\"noopener noreferrer\">Spring Boot 2.x \u6559\u7a0b\uff0c\u592a\u5168\u4e86\uff01<\/a><\/p>\n<p>4.<a target=\"_blank\" href=\"https:\/\/link.segmentfault.com\/?enc=S04DdEAmU58EJyjxWJiOyg%3D%3D.M6AEST%2BzLyPJFSk%2BSud6B7B1o%2B1vXBUOFetGhNcvGlUe3K96GAafr6DAqOma52q0IlngeL%2Bei9r0z%2FmfxaaPQg%3D%3D\" rel=\"noopener noreferrer\">\u522b\u518d\u5199\u6ee1\u5c4f\u7684\u7206\u7206\u7206\u70b8\u7c7b\u4e86\uff0c\u8bd5\u8bd5\u88c5\u9970\u5668\u6a21\u5f0f\uff0c\u8fd9\u624d\u662f\u4f18\u96c5\u7684\u65b9\u5f0f\uff01\uff01<\/a><\/p>\n<p>5.<a target=\"_blank\" href=\"https:\/\/link.segmentfault.com\/?enc=Ruo0gmZoJastmX%2BqmCIdwA%3D%3D.PC%2FPzJM%2Fu198CPoDFWGcmwZ00pH%2F0L0UsiEtj%2BO6y1ZCHnA%2FD0mdyR1o7j%2F0olQuwhp2qhXFrSKEsQKrAG5Tz9KuvN9vVm%2Bx5fnWTjKgaos%3D\" rel=\"noopener noreferrer\">\u300aJava\u5f00\u53d1\u624b\u518c\uff08\u5d69\u5c71\u7248\uff09\u300b\u6700\u65b0\u53d1\u5e03\uff0c\u901f\u901f\u4e0b\u8f7d\uff01<\/a><\/p>\n<p>\u89c9\u5f97\u4e0d\u9519\uff0c\u522b\u5fd8\u4e86\u968f\u624b\u70b9\u8d5e+\u8f6c\u53d1\u54e6\uff01<\/p>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000044149389\">https:\/\/segmentfault.com\/a\/1190000044149389<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6765\u6e90\uff1ahttps:\/\/heapdump.cn\/article\/1859160 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[&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-10008166","post","type-post","status-publish","format-standard","hentry","category-share"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10008166","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10008166"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10008166\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10008166"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10008166"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10008166"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}