{"id":2727,"date":"2023-07-06T15:57:53","date_gmt":"2023-07-06T07:57:53","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/?p=2727"},"modified":"2023-07-07T16:26:56","modified_gmt":"2023-07-07T08:26:56","slug":"%e3%80%9013-jvm%e9%9d%a2%e8%af%95%e4%b8%93%e9%a2%98-jvm%e8%b0%83%e4%bc%98%e7%bb%8f%e9%aa%8c-jvm%e8%b0%83%e4%bc%98%e5%b8%b8%e7%94%a8%e5%91%bd%e4%bb%a4-g1%e8%b0%83%e4%bc%98%e7%ad%96%e7%95%a5-jvm","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/jvm\/%e3%80%9013-jvm%e9%9d%a2%e8%af%95%e4%b8%93%e9%a2%98-jvm%e8%b0%83%e4%bc%98%e7%bb%8f%e9%aa%8c-jvm%e8%b0%83%e4%bc%98%e5%b8%b8%e7%94%a8%e5%91%bd%e4%bb%a4-g1%e8%b0%83%e4%bc%98%e7%ad%96%e7%95%a5-jvm\/","title":{"rendered":"\u301013-JVM\u9762\u8bd5\u4e13\u9898-JVM\u8c03\u4f18\u7ecf\u9a8c-JVM\u8c03\u4f18\u5e38\u7528\u547d\u4ee4-G1\u8c03\u4f18\u7b56\u7565-JVM\u6027\u80fd\u4f18\u5316\u6307\u5357-JVM\u6027\u80fd\u8c03\u4f18\u7684\u5de5\u5177\u3011"},"content":{"rendered":"<link rel=\"stylesheet\" href=\"https:\/\/csdnimg.cn\/release\/blogv2\/dist\/mdeditor\/css\/editerView\/kdoc_html_views-1a98987dfd.css\">\n \t \t<link rel=\"stylesheet\" href=\"https:\/\/csdnimg.cn\/release\/blogv2\/dist\/mdeditor\/css\/editerView\/ck_htmledit_views-25cebea3f9.css\">\n<div id=\"content_views\" class=\"markdown_views prism-atom-one-dark\">\n <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"display: none;\"> <path stroke-linecap=\"round\" d=\"M5,0 0,2.5 5,5z\" id=\"raphael-marker-block\" style=\"-webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"><\/path>\n <\/svg><\/p>\n<h1><a id=\"JVMJVMG1JVMJVM_0\"><\/a>JVM\u8c03\u4f18\u7ecf\u9a8c-JVM\u8c03\u4f18\u5e38\u7528\u547d\u4ee4-G1\u8c03\u4f18\u7b56\u7565-JVM\u6027\u80fd\u4f18\u5316\u6307\u5357-JVM\u6027\u80fd\u8c03\u4f18\u7684\u5de5\u5177<\/h1>\n<p><img decoding=\"async\" class=\"lazyload\"data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-06\/15-53-41\/202307061553416e6e23cea.jpeg\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"><noscript><img decoding=\"async\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-06\/15-53-41\/202307061553416e6e23cea.jpeg\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"><\/noscript><\/p>\n<blockquote><p>JVM\u8c03\u4f18\u7ecf\u9a8c-JVM\u8c03\u4f18\u5e38\u7528\u547d\u4ee4-G1\u8c03\u4f18\u7b56\u7565-JVM\u6027\u80fd\u4f18\u5316\u6307\u5357-JVM\u6027\u80fd\u8c03\u4f18\u7684\u5de5\u5177\uff1f\u4f60\u638c\u63e1\u7684\u600e\u4e48\u6837\u5462\uff1f<\/p><\/blockquote>\n<h2><a id=\"JVMJVM_9\"><\/a>JVM\u8c03\u4f18\u7ecf\u9a8c-JVM\u8c03\u4f18\u5e38\u7528\u547d\u4ee4<\/h2>\n<h3><a id=\"java_10\"><\/a>\u67e5\u770bjava\u8fdb\u7a0b<\/h3>\n<pre><code class=\"prism language-java\">jps\n<\/code><\/pre>\n<h3><a id=\"JVM_16\"><\/a>\u5b9e\u65f6\u67e5\u770b\u548c\u8c03\u6574JVM\u914d\u7f6e\u53c2\u6570<\/h3>\n<pre><code class=\"prism language-java\">jinfo\n<\/code><\/pre>\n<h3><a id=\"javaname_22\"><\/a>\u67e5\u770b\u7528\u6cd5(\u67e5\u770b\u67d0\u4e2ajava\u8fdb\u7a0b\u7684name\u5c5e\u6027\u7684\u503c)<\/h3>\n<pre><code class=\"prism language-java\">jinfo <span class=\"token operator\">-<\/span>flag <span class=\"token class-name\">MaxHeapSize<\/span> <span class=\"token constant\">PID<\/span> \njinfo <span class=\"token operator\">-<\/span>flag <span class=\"token class-name\">UseG1GC<\/span> <span class=\"token constant\">PID<\/span>\n<\/code><\/pre>\n<h3><a id=\"manageableflags_29\"><\/a>\u4fee\u6539(\u53c2\u6570\u53ea\u6709\u88ab\u6807\u8bb0\u4e3amanageable\u7684flags\u53ef\u4ee5\u88ab\u5b9e\u65f6\u4fee\u6539)<\/h3>\n<pre><code class=\"prism language-java\">jinfo <span class=\"token operator\">-<\/span>flag <span class=\"token punctuation\">[<\/span><span class=\"token operator\">+<\/span><span class=\"token operator\">|<\/span><span class=\"token operator\">-<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token constant\">PID<\/span>\njinfo <span class=\"token operator\">-<\/span>flag <span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span>name<span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token operator\">=<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span>value<span class=\"token punctuation\">&gt;<\/span><\/span> <span class=\"token constant\">PID<\/span>\n<\/code><\/pre>\n<h3><a id=\"_35\"><\/a>\u67e5\u770b\u66fe\u7ecf\u8d4b\u8fc7\u503c\u7684\u4e00\u4e9b\u53c2\u6570<\/h3>\n<pre><code class=\"prism language-java\">jinfo <span class=\"token operator\">-<\/span>flags <span class=\"token constant\">PID<\/span>\n<\/code><\/pre>\n<h3><a id=\"_43\"><\/a>\u67e5\u770b\u865a\u62df\u673a\u6027\u80fd\u7edf\u8ba1\u4fe1\u606f<\/h3>\n<pre><code class=\"prism language-java\">jstat\n<\/code><\/pre>\n<h3><a id=\"_49\"><\/a>\u67e5\u770b\u7c7b\u88c5\u8f7d\u4fe1\u606f<\/h3>\n<pre><code class=\"prism language-java\">jstat <span class=\"token operator\">-<\/span><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">PID<\/span> <span class=\"token number\">1000<\/span> <span class=\"token number\">10<\/span>   \u67e5\u770b\u67d0\u4e2ajava\u8fdb\u7a0b\u7684\u7c7b\u88c5\u8f7d\u4fe1\u606f\uff0c\u6bcf<span class=\"token number\">1000<\/span>\u6beb\u79d2\u8f93\u51fa\u4e00\u6b21\uff0c\u5171\u8f93\u51fa<span class=\"token number\">10<\/span>\u6b21\n<\/code><\/pre>\n<h3><a id=\"_55\"><\/a>\u67e5\u770b\u5783\u573e\u6536\u96c6\u4fe1\u606f<\/h3>\n<pre><code class=\"prism language-java\">jstat <span class=\"token operator\">-<\/span>gc <span class=\"token constant\">PID<\/span> <span class=\"token number\">1000<\/span> <span class=\"token number\">10<\/span>\n<\/code><\/pre>\n<h3><a id=\"_62\"><\/a>\u67e5\u770b\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f<\/h3>\n<pre><code class=\"prism language-java\">jstack\n<\/code><\/pre>\n<h3><a id=\"_68\"><\/a>\u67e5\u770b\u67d0\u4e00\u4e2a\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f<\/h3>\n<pre><code class=\"prism language-java\">jstack <span class=\"token constant\">PID<\/span>\n<\/code><\/pre>\n<h2><a id=\"G1_74\"><\/a>G1\u8c03\u4f18\u7b56\u7565<\/h2>\n<p>\uff081\uff09\u4e0d\u8981\u624b\u52a8\u8bbe\u7f6e\u65b0\u751f\u4ee3\u548c\u8001\u5e74\u4ee3\u7684\u5927\u5c0f\uff0c\u53ea\u8981\u8bbe\u7f6e\u6574\u4e2a\u5806\u7684\u5927\u5c0f<\/p>\n<p>G1\u7684\u81ea\u52a8\u8c03\u4f18\uff1a<a href=\"https:\/\/blogs.oracle.com\/poonam\/increased-heap-usage-with-g1-gc\" target=\"_blank\"  rel=\"nofollow\" >https:\/\/blogs.oracle.com\/poonam\/increased-heap-usage-with-g1-gc<\/a><\/p>\n<pre><code class=\"prism language-java\"><span class=\"token constant\">G1<\/span>\u6536\u96c6\u5668\u5728\u8fd0\u884c\u8fc7\u7a0b\u4e2d\uff0c\u4f1a\u81ea\u5df1\u8c03\u6574\u65b0\u751f\u4ee3\u548c\u8001\u5e74\u4ee3\u7684\u5927\u5c0f\n\u5176\u5b9e\u662f\u901a\u8fc7adapt\u4ee3\u7684\u5927\u5c0f\u6765\u8c03\u6574\u5bf9\u8c61\u664b\u5347\u7684\u901f\u5ea6\u548c\u5e74\u9f84\uff0c\u4ece\u800c\u8fbe\u5230\u4e3a\u6536\u96c6\u5668\u8bbe\u7f6e\u7684\u6682\u505c\u65f6\u95f4\u76ee\u6807\n\u5982\u679c\u624b\u52a8\u8bbe\u7f6e\u4e86\u5927\u5c0f\u5c31\u610f\u5473\u7740\u653e\u5f03\u4e86<span class=\"token constant\">G1<\/span>\u7684\u81ea\u52a8\u8c03\u4f18\n<\/code><\/pre>\n<p>\uff082\uff09\u4e0d\u65ad\u8c03\u4f18\u6682\u505c\u65f6\u95f4\u76ee\u6807<\/p>\n<pre><code class=\"prism language-java\"> \u4e00\u822c\u60c5\u51b5\u4e0b\u8fd9\u4e2a\u503c\u8bbe\u7f6e\u5230<span class=\"token number\">100<\/span>ms\u6216\u8005<span class=\"token number\">200<\/span>ms\u90fd\u662f\u53ef\u4ee5\u7684<span class=\"token punctuation\">(<\/span>\u4e0d\u540c\u60c5\u51b5\u4e0b\u4f1a\u4e0d\u4e00\u6837<span class=\"token punctuation\">)<\/span>\uff0c\u4f46\u5982\u679c\u8bbe\u7f6e\u6210<span class=\"token number\">50<\/span>ms\u5c31\u4e0d\u592a\u5408\u7406\u3002\u6682\u505c\u65f6\u95f4\u8bbe\u7f6e\u7684\u592a\u77ed\uff0c\u5c31\u4f1a\u5bfc\u81f4\u51fa\u73b0<span class=\"token constant\">G1<\/span>\u8ddf\u4e0d\u4e0a\u5783\u573e\u4ea7\u751f\u7684\u901f\u5ea6\u3002\u6700\u7ec8\u9000\u5316\u6210<span class=\"token class-name\">Full<\/span> <span class=\"token constant\">GC<\/span>\u3002\u6240\u4ee5\u5bf9\u8fd9\u4e2a\u53c2\u6570\u7684\u8c03\u4f18\u662f\u4e00\u4e2a\u6301\u7eed\u7684\u8fc7\u7a0b\uff0c\u9010\u6b65\u8c03\u6574\u5230\u6700\u4f73\u72b6\u6001\u3002\u6682\u505c\u65f6\u95f4\u53ea\u662f\u4e00\u4e2a\u76ee\u6807\uff0c\u5e76\u4e0d\u80fd\u603b\u662f\u5f97\u5230\u6ee1\u8db3\u3002\n<\/code><\/pre>\n<p>\uff083\uff09\u4f7f\u7528-XX:ConcGCThreads=n\u6765\u589e\u52a0\u6807\u8bb0\u7ebf\u7a0b\u7684\u6570\u91cf<\/p>\n<pre><code class=\"prism language-java\"><span class=\"token constant\">IHOP<\/span>\u5982\u679c\u9600\u503c\u8bbe\u7f6e\u8fc7\u9ad8\uff0c\u53ef\u80fd\u4f1a\u9047\u5230\u8f6c\u79fb\u5931\u8d25\u7684\u98ce\u9669\uff0c\u6bd4\u5982\u5bf9\u8c61\u8fdb\u884c\u8f6c\u79fb\u65f6\u7a7a\u95f4\u4e0d\u8db3\u3002\u5982\u679c\u9600\u503c\u8bbe\u7f6e\u8fc7\u4f4e\uff0c\u5c31\u4f1a\u4f7f\u6807\u8bb0\u5468\u671f\u8fd0\u884c\u8fc7\u4e8e\u9891\u7e41\uff0c\u5e76\u4e14\u6709\u53ef\u80fd\u6df7\u5408\u6536\u96c6\u671f\u56de\u6536\u4e0d\u5230\u7a7a\u95f4\u3002 \n<span class=\"token constant\">IHOP<\/span>\u503c\u5982\u679c\u8bbe\u7f6e\u5408\u7406\uff0c\u4f46\u662f\u5728\u5e76\u53d1\u5468\u671f\u65f6\u95f4\u8fc7\u957f\u65f6\uff0c\u53ef\u4ee5\u5c1d\u8bd5\u589e\u52a0\u5e76\u53d1\u7ebf\u7a0b\u6570\uff0c\u8c03\u9ad8<span class=\"token class-name\">ConcGCThreads<\/span>\u3002\n<\/code><\/pre>\n<p>\uff084\uff09MixedGC\u8c03\u4f18<\/p>\n<pre><code class=\"prism language-java\"><span class=\"token operator\">-<\/span><span class=\"token constant\">XX<\/span><span class=\"token operator\">:<\/span><span class=\"token class-name\">InitiatingHeapOccupancyPercent<\/span>\n<span class=\"token operator\">-<\/span><span class=\"token constant\">XX<\/span><span class=\"token operator\">:<\/span><span class=\"token class-name\">G1MixedGCLiveThresholdPercent<\/span>\n<span class=\"token operator\">-<\/span><span class=\"token constant\">XX<\/span><span class=\"token operator\">:<\/span><span class=\"token class-name\">G1MixedGCCountTarger<\/span>\n<span class=\"token operator\">-<\/span><span class=\"token constant\">XX<\/span><span class=\"token operator\">:<\/span><span class=\"token class-name\">G1OldCSetRegionThresholdPercent<\/span>\n<\/code><\/pre>\n<p>\uff085\uff09\u9002\u5f53\u589e\u52a0\u5806\u5185\u5b58\u5927\u5c0f<\/p>\n<p>\uff086\uff09\u4e0d\u6b63\u5e38\u7684Full GC**<\/p>\n<p>\u6ce8\u610f:\u6709\u65f6\u5019\u4f1a\u53d1\u73b0\u7cfb\u7edf\u521a\u521a\u542f\u52a8\u7684\u65f6\u5019\uff0c\u5c31\u4f1a\u53d1\u751f\u4e00\u6b21Full GC\uff0c\u4f46\u662f\u8001\u5e74\u4ee3\u7a7a\u95f4\u6bd4\u8f83\u5145\u8db3\uff0c\u4e00\u822c\u662f\u7531Metaspace\u533a\u57df\u5f15\u8d77\u7684\u3002\u53ef\u4ee5\u901a\u8fc7MetaspaceSize\u9002\u5f53\u589e\u52a0\u5176\u5927\u5bb6\uff0c\u6bd4\u5982256M\u3002<\/p>\n<h2><a id=\"JVM_116\"><\/a>JVM\u6027\u80fd\u8c03\u4f18\u7684\u5de5\u5177<\/h2>\n<h3><a id=\"1_117\"><\/a>1.\u6027\u80fd\u76d1\u63a7\u5de5\u5177<\/h3>\n<h4><a id=\"11_jconsole_118\"><\/a>1.1 jconsole<\/h4>\n<p>JConsole\u5de5\u5177\u662fJDK\u81ea\u5e26\u7684\u56fe\u5f62\u5316\u6027\u80fd\u76d1\u63a7\u5de5\u5177\u3002\u5e76\u901a\u8fc7JConsole\u5de5\u5177\uff0c \u53ef\u4ee5\u67e5\u770bJava\u5e94\u7528\u7a0b\u5e8f\u7684\u8fd0\u884c\u6982\u51b5\uff0c \u76d1\u63a7\u5806\u4fe1\u606f\u3001 \u5143\u7a7a\u95f4\u4f7f\u7528\u60c5\u51b5\u53ca\u7c7b\u7684\u52a0\u8f7d\u60c5\u51b5\u7b49\u3002<\/p>\n<h4><a id=\"12_jvisualvm_120\"><\/a>1.2 jvisualvm<\/h4>\n<p>\u5b98\u7f51\uff1ahttps:\/\/docs.oracle.com\/javase\/8\/docs\/technotes\/tools\/unix\/jvisualvm.html<\/p>\n<p>Java VisualVM \u662f\u4e00\u4e2a\u76f4\u89c2\u7684\u56fe\u5f62\u7528\u6237\u754c\u9762\uff0c\u53ef\u5728\u57fa\u4e8e Java \u6280\u672f\u7684\u5e94\u7528\u7a0b\u5e8f\uff08Java \u5e94\u7528\u7a0b\u5e8f\uff09\u5728\u6307\u5b9a\u7684 Java \u865a\u62df\u673a (JVM) \u4e0a\u8fd0\u884c\u65f6\u63d0\u4f9b\u6709\u5173\u5b83\u4eec\u7684\u8be6\u7ec6\u4fe1\u606f\u3002<\/p>\n<p>Java VisualVM \u5c06\u591a\u4e2a\u76d1\u63a7\u3001\u6545\u969c\u6392\u9664\u548c\u5206\u6790\u5b9e\u7528\u7a0b\u5e8f\u7ec4\u5408\u5230\u4e00\u4e2a\u5de5\u5177\u4e2d\u3002\u4f8b\u5982\uff0c\u72ec\u7acb\u5de5\u5177jmap\u3001jinfo\u548c\u63d0\u4f9bjstat,\u7684\u5927\u90e8\u5206\u529f\u80fdjstack\u90fd\u96c6\u6210\u5230 Java VisualVM \u4e2d\u3002\u5176\u4ed6\u529f\u80fd\uff0c\u4f8b\u5982jconsole\u547d\u4ee4\u63d0\u4f9b\u7684\u4e00\u4e9b\u529f\u80fd\uff0c\u53ef\u4ee5\u4f5c\u4e3a\u53ef\u9009\u63d2\u4ef6\u6dfb\u52a0\u3002<\/p>\n<p>Java VisualVM \u5bf9\u4e8e Java \u5e94\u7528\u7a0b\u5e8f\u5f00\u53d1\u4eba\u5458\u5bf9\u5e94\u7528\u7a0b\u5e8f\u8fdb\u884c\u6545\u969c\u6392\u9664\u4ee5\u53ca\u76d1\u63a7\u548c\u6539\u8fdb\u5e94\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u975e\u5e38\u6709\u7528\u3002Java VisualVM \u4f7f\u5f00\u53d1\u4eba\u5458\u80fd\u591f\u751f\u6210\u548c\u5206\u6790\u5806\u8f6c\u50a8\u3001\u8ddf\u8e2a\u5185\u5b58\u6cc4\u6f0f\u3001\u6267\u884c\u548c\u76d1\u89c6\u5783\u573e\u6536\u96c6\u4ee5\u53ca\u6267\u884c\u8f7b\u91cf\u7ea7\u5185\u5b58\u548c CPU \u5206\u6790\u3002<\/p>\n<h4><a id=\"13_arthas_128\"><\/a>1.3 arthas<\/h4>\n<p>github\uff1ahttps:\/\/github.com\/alibaba\/arthas<\/p>\n<pre><code class=\"prism language-java\"><span class=\"token class-name\">Arthas<\/span> allows developers <span class=\"token keyword\">to<\/span> <span class=\"token namespace\">troubleshoot<\/span> production issues <span class=\"token keyword\">for<\/span> <span class=\"token class-name\">Java<\/span>\napplications without modifying code or restarting servers<span class=\"token punctuation\">.<\/span>\n<\/code><\/pre>\n<p>Arthas \u662fAlibaba\u5f00\u6e90\u7684Java\u8bca\u65ad\u5de5\u5177\uff0c\u91c7\u7528\u547d\u4ee4\u884c\u4ea4\u4e92\u6a21\u5f0f\uff0c\u662f\u6392\u67e5jvm\u76f8\u5173\u95ee\u9898\u7684\u5229\u5668\u3002<\/p>\n<h3><a id=\"2_139\"><\/a>2.\u5185\u5b58\u5206\u6790\u5de5\u5177<\/h3>\n<h4><a id=\"21_MATMemory_Analyzer_Tool_141\"><\/a>2.1 MAT\uff08Memory Analyzer Tool\uff09<\/h4>\n<p>MAT\u662f\u4e00\u6b3e\u975e\u5e38\u5f3a\u5927\u7684\u5185\u5b58\u5206\u6790\u5de5\u5177\uff0c\u5728Eclipse\u4e2d\u6709\u76f8\u5e94\u7684\u63d2\u4ef6\uff0c\u540c\u65f6\u4e5f\u6709\u5355\u72ec\u7684\u5b89\u88c5\u5305\u3002\u5728\u8fdb\u884c\u5185\u5b58\u5206\u6790\u65f6\uff0c\u53ea\u8981\u83b7\u5f97\u4e86\u53cd\u6620\u5f53\u524d\u8bbe\u5907\u5185\u5b58\u6620\u50cf\u7684hprof\u6587\u4ef6\uff0c\u901a\u8fc7MAT\u6253\u5f00\u5c31\u53ef\u4ee5\u76f4\u89c2\u5730\u770b\u5230\u5f53\u524d\u7684\u5185\u5b58\u4fe1\u606f\u3002\u4e00\u822c\u8bf4\u6765\uff0c\u8fd9\u4e9b\u5185\u5b58\u4fe1\u606f\u5305\u542b\uff1a<\/p>\n<ul>\n<li>\u6240\u6709\u7684\u5bf9\u8c61\u4fe1\u606f\uff0c\u5305\u62ec\u5bf9\u8c61\u5b9e\u4f8b\u3001\u6210\u5458\u53d8\u91cf\u3001\u5b58\u50a8\u4e8e\u6808\u4e2d\u7684\u57fa\u672c\u7c7b\u578b\u503c\u548c\u5b58\u50a8\u4e8e\u5806\u4e2d\u7684\u5176\u4ed6\u5bf9\u8c61\u7684\u5f15\u7528\u503c\u3002<\/li>\n<li>\u6240\u6709\u7684\u7c7b\u4fe1\u606f\uff0c\u5305\u62ecclassloader\u3001\u7c7b\u540d\u79f0\u3001\u7236\u7c7b\u3001\u9759\u6001\u53d8\u91cf\u7b49<\/li>\n<li>GCRoot\u5230\u6240\u6709\u7684\u8fd9\u4e9b\u5bf9\u8c61\u7684\u5f15\u7528\u8def\u5f84<\/li>\n<li>\u7ebf\u7a0b\u4fe1\u606f\uff0c\u5305\u62ec\u7ebf\u7a0b\u7684\u8c03\u7528\u6808\u53ca\u6b64\u7ebf\u7a0b\u7684\u7ebf\u7a0b\u5c40\u90e8\u53d8\u91cf\uff08TLS\uff09<\/li>\n<\/ul>\n<h4><a id=\"22_heaphero_150\"><\/a>2.2 heaphero<\/h4>\n<p><a href=\"https:\/\/heaphero.io\/\" target=\"_blank\"  rel=\"nofollow\" >https:\/\/heaphero.io\/<\/a><\/p>\n<h4><a id=\"23_perfma_154\"><\/a>2.3 perfma<\/h4>\n<p>\u7b28\u9a6c\u662f\u4e00\u4e2aJVM\u8c03\u4f18\u5de5\u5177\uff0c\u751a\u81f3\u4f1a\u7ed9\u4f60\u76f8\u5e94\u7684JVM\u8c03\u4f18\u5efa\u8bae\uff0c\u4f46\u662f\u4ed6\u662f\u4e00\u4e2a\u6536\u8d39\u5de5\u5177\uff0c\u4e0d\u8fc7\u5982\u679c\u4f60\u4ec5\u4ec5\u662f\u5e0c\u671b\u8c03\u4f18\u53c2\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528\u8bd5\u7528\u7248\u3002\u4f46\u662f\u4ed6\u7684\u8c03\u4f18\u5efa\u8bae\u90fd\u662f\u7b80\u5355\u7684\u53c2\u6570\u8bbe\u7f6e\u3002<\/p>\n<p><a href=\"https:\/\/console.perfma.com\/\" target=\"_blank\"  rel=\"nofollow\" >https:\/\/console.perfma.com\/<\/a><\/p>\n<h3><a id=\"3_160\"><\/a>3.\u65e5\u5fd7\u5206\u6790\u5de5\u5177<\/h3>\n<blockquote><p>\u8981\u60f3\u5206\u6790\u65e5\u5fd7\u7684\u4fe1\u606f\uff0c\u5f97\u5148\u62ff\u5230GC\u65e5\u5fd7\u6587\u4ef6\u624d\u884c\uff0c\u6240\u4ee5\u5f97\u5148\u914d\u7f6e\u4e00\u4e0b\uff0c\u6839\u636e\u524d\u9762\u53c2\u6570\u7684\u5b66\u4e60\uff0c\u4e0b\u9762\u7684\u914d\u7f6e\u5f88\u5bb9\u6613\u770b\u61c2\u3002\u6bd4\u5982\u6253\u5f00windows\u4e2d\u7684catalina.bat\uff0c\u5728\u7b2c\u4e00\u884c\u52a0\u4e0a<br \/>\nXX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintGCDateStamps<br \/>\n-Xloggc:$CATALINA_HOME\/logs\/gc.log<\/p><\/blockquote>\n<h4><a id=\"31_GCViewer_165\"><\/a>3.1 GCViewer<\/h4>\n<p>java -jar gcviewer-1.36-SNAPSHOT.jar<\/p>\n<h4><a id=\"32_gceasy_167\"><\/a>3.2 gceasy<\/h4>\n<p>http:\/\/gceasy.io<\/p>\n<h4><a id=\"33_gcplot_169\"><\/a>3.3 gcplot<\/h4>\n<p>https:\/\/it.gcplot.com\/<\/p>\n<h2><a id=\"JVM_172\"><\/a>JVM\u6027\u80fd\u4f18\u5316\u6307\u5357<\/h2>\n<p><img decoding=\"async\" class=\"lazyload\"data-src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-06\/15-54-22\/202307061554223939fcf64.png\" src=\"https:\/\/s.nmxc.ltd\/sakurairo_vision\/@2.6\/load_svg\/inload.svg\" onerror=\"imgError(this)\" alt=\"image.png\"><noscript><img decoding=\"async\" src=\"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-06\/15-54-22\/202307061554223939fcf64.png\" alt=\"image.png\"><\/noscript><\/p>\n<h1><a id=\"_176\"><\/a>\u603b\u7ed3:<\/h1>\n<p>JVM\u77e5\u8bc6\u5728\u9762\u8bd5\u8fc7\u7a0b\u4e2d\u975e\u5e38\u9ad8\u9891\uff0c\u5927\u5bb6\u4e00\u5b9a\u8981\u7262\u7262\u638c\u63e1\uff0c\u5982\u679c\u4ee5\u4e0a\u6587\u7ae0\u6709\u5e2e\u52a9\u5230\u4f60\uff0c\u5e0c\u671b\u53ef\u4ee5\u70b9\u4e2a\u5173\u6ce8\uff0c\u7559\u4e0b\u5c5e\u4e8e\u4f60\u7684\u8db3\u8ff9\uff0c\u6bd4\u5fc3\uff01\u6211\u4eec\u4e0b\u8282\u518d\u89c1\u54e6\u3002<\/p>\n<\/div>\n<link href=\"https:\/\/csdnimg.cn\/release\/blogv2\/dist\/mdeditor\/css\/editerView\/markdown_views-98b95bb57c.css\" rel=\"stylesheet\">\n \t \t<link href=\"https:\/\/csdnimg.cn\/release\/blogv2\/dist\/mdeditor\/css\/style-c216769e99.css\" rel=\"stylesheet\">\u672c\u7bc7\u6587\u7ae0\u6765\u6e90\u4e8eCSDN\uff1ahttps:\/\/blog.csdn.net\/Coder_ljw\/article\/details\/129173245<\/p>\n","raw":"","protected":false},"excerpt":{"rendered":"<p>JVM\u8c03\u4f18\u7ecf\u9a8c-JVM\u8c03\u4f18\u5e38\u7528\u547d\u4ee4-G1\u8c03\u4f18\u7b56\u7565-JVM\u6027\u80fd\u4f18\u5316\u6307\u5357-JVM\u6027\u80fd\u8c03\u4f18\u7684\u5de5\u5177 JVM\u8c03\u4f18\u7ecf\u9a8c-JVM\u8c03\u4f18\u5e38\u7528\u547d\u4ee4-G &#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[27],"tags":[],"class_list":["post-2727","post","type-post","status-publish","format-standard","hentry","category-jvm"],"post_thumbnail_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-06\/15-53-41\/202307061553416e6e23cea.jpeg","content_first_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-06\/15-53-41\/202307061553416e6e23cea.jpeg","post_medium_image_300":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-06\/15-53-41\/202307061553416e6e23cea.jpeg","post_thumbnail_image_624":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-06\/15-53-41\/202307061553416e6e23cea.jpeg","post_frist_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-06\/15-53-41\/202307061553416e6e23cea.jpeg","post_medium_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-06\/15-53-41\/202307061553416e6e23cea.jpeg","post_large_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-06\/15-53-41\/202307061553416e6e23cea.jpeg","post_full_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-06\/15-53-41\/202307061553416e6e23cea.jpeg","post_all_images":[{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-06\/15-53-41\/202307061553416e6e23cea.jpeg","id":"image0"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-06\/15-53-41\/202307061553416e6e23cea.jpeg","id":"image1"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-06\/15-54-22\/202307061554223939fcf64.png","id":"image2"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-06\/15-54-22\/202307061554223939fcf64.png","id":"image3"}],"videoAdId":"","listAd":"0","listAdId":"","listAdEvery":6,"total_comments":0,"category_name":"JVM","post_date":"2023-07-06","like_count":"0","praiseWord":"\u9f13\u52b1","copyright_state":"","excitationAd":"0","rewardedVideoAdId":"","detailAdId":"","detailAd":"0","enterpriseMinapp":"0","audios":[],"postImageUrl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230519082947553.jpg","avatarurls":[],"related_posts":null,"pageviews":318,"next_post_id":2845,"next_post_title":"JVM\u53c2\u6570`-D`\u3001`-X`\u3001`-XX`\u50bb\u50bb\u5206\u4e0d\u6e05\uff1f\u6587\u672b\u9001\u4e66\uff01","previous_post_id":null,"previous_post_title":null,"_links":{"self":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/2727","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/comments?post=2727"}],"version-history":[{"count":0,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/2727\/revisions"}],"wp:attachment":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/media?parent=2727"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/categories?post=2727"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/tags?post=2727"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}