{"id":16171,"date":"2024-08-19T09:43:03","date_gmt":"2024-08-19T01:43:03","guid":{"rendered":"https:\/\/92it.top\/?p=16171"},"modified":"2024-08-19T09:43:03","modified_gmt":"2024-08-19T01:43:03","slug":"%e4%bb%80%e4%b9%88%e6%98%af-heap-dump%ef%bc%9fjava-%e5%a6%82%e4%bd%95%e7%94%9f%e6%88%90-heap-dump%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=16171","title":{"rendered":"\u4ec0\u4e48\u662f Heap dump\uff1fJava \u5982\u4f55\u751f\u6210 Heap dump\uff1f"},"content":{"rendered":"\n

\u8f6c\u8f7d\uff1a\u4ec0\u4e48\u662f Heap dump\uff1fJava \u5982\u4f55\u751f\u6210 Heap dump\uff1f<\/a><\/p>\n\n\n\n

\u5728 Java\u4e2d\u751f\u6210 Heap dump\uff08\u5806\u8f6c\u50a8\uff09\u662f\u8fdb\u884c\u5185\u5b58\u5206\u6790\u548c\u6545\u969c\u6392\u67e5\u7684\u91cd\u8981\u624b\u6bb5\uff0cHeap dump \u662fJava\u865a\u62df\u673a\uff08JVM\uff09\u5728\u67d0\u4e00\u65f6\u523b\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\u7684\u5feb\u7167\u3002\u8fd9\u7bc7\u6587\u7ae0\u5c06\u5206\u6790\u51e0\u79cd\u5e38\u89c1\u7684\u751f\u6210 Head dump\u7684\u65b9\u5f0f\u3002<\/p>\n\n\n\n

Heap dump\u662f\u4ec0\u4e48\uff1f<\/strong><\/p>\n\n\n\n

\n\n\n\n

Heap dump\uff08\u5806\u8f6c\u50a8\uff09\u662fJava\u865a\u62df\u673a\uff08JVM\uff09\u5728\u67d0\u4e00\u65f6\u523b\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\u7684\u5feb\u7167\u3002\u5b83\u5305\u542b\u4e86JVM\u5806\u4e2d\u7684\u6240\u6709\u5bf9\u8c61\u53ca\u5176\u5f15\u7528\u5173\u7cfb\u3001\u7c7b\u7684\u5143\u6570\u636e\u3001\u7ebf\u7a0b\u6808\u4fe1\u606f\u7b49\u3002Heap Dump \u6587\u4ef6\u901a\u5e38\u7528\u6765\u8fdb\u884c\u5185\u5b58\u5206\u6790\u548c\u6545\u969c\u6392\u67e5\uff0c\u5e2e\u52a9\u5f00\u53d1\u8005\u548c\u8fd0\u7ef4\u4eba\u5458\u8bca\u65ad\u5185\u5b58\u6cc4\u6f0f\u3001\u5185\u5b58\u6ea2\u51fa\uff08OutOfMemoryError\uff09\u7b49\u95ee\u9898\u3002<\/p>\n\n\n\n

Heap dump \u5305\u542b\u4ec0\u4e48\u4fe1\u606f\uff1f<\/strong><\/p>\n\n\n\n

\n\n\n\n

Heap dump \u5305\u542b\u7684\u4fe1\u606f\u5982\u4e0b\uff1a<\/p>\n\n\n\n

    \n
  1. \u6240\u6709\u5bf9\u8c61\u7684\u4fe1\u606f<\/strong>\uff1a<\/li>\n<\/ol>\n\n\n\n
      \n
    • \u5bf9\u8c61\u7684\u7c7b\u4fe1\u606f\u3001\u5b57\u6bb5\u4fe1\u606f\u3002<\/li>\n\n\n\n
    • \u539f\u751f\u503c\uff08\u5982int\u3001long\u7b49\uff09\u53ca\u5f15\u7528\u503c\u3002<\/li>\n<\/ul>\n\n\n\n
        \n
      1. \u6240\u6709\u7c7b\u7684\u4fe1\u606f<\/strong>\uff1a<\/li>\n<\/ol>\n\n\n\n
          \n
        • \u7c7b\u52a0\u8f7d\u5668\u3001\u7c7b\u540d\u3001\u8d85\u7c7b\u3002<\/li>\n\n\n\n
        • \u9759\u6001\u5b57\u6bb5\u3002<\/li>\n<\/ul>\n\n\n\n
            \n
          1. \u5783\u573e\u56de\u6536\u7684\u6839\u5bf9\u8c61<\/strong>\uff1a<\/li>\n<\/ol>\n\n\n\n
              \n
            • \u6839\u5bf9\u8c61\u662f\u6307\u90a3\u4e9b\u53ef\u4ee5\u76f4\u63a5\u88ab\u865a\u62df\u673a\u89e6\u53ca\u7684\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n\n\n\n
                \n
              1. \u7ebf\u7a0b\u6808\u53ca\u5c40\u90e8\u53d8\u91cf<\/strong>\uff1a<\/li>\n<\/ol>\n\n\n\n
                  \n
                • \u8f6c\u50a8\u65f6\u523b\u7684\u7ebf\u7a0b\u8c03\u7528\u6808\u4fe1\u606f\u3002<\/li>\n\n\n\n
                • \u6808\u5e27\u4e2d\u7684\u5c40\u90e8\u53d8\u91cf\u4fe1\u606f\u3002<\/li>\n<\/ul>\n\n\n\n

                  \u751f\u6210 Head dump\u7684\u65b9\u5f0f<\/strong><\/p>\n\n\n\n

                  \n\n\n\n

                  \u5e38\u7528\u7684\u751f\u6210Heap dump\u7684\u65b9\u5f0f\u6709\u4ee5\u4e0b\u51e0\u79cd\uff1a<\/p>\n\n\n\n

                    \n
                  1. \u4f7f\u7528jmap<\/code>\u5de5\u5177<\/li>\n\n\n\n
                  2. \u4f7f\u7528jcmd<\/code>\u5de5\u5177<\/li>\n\n\n\n
                  3. \u4f7f\u7528jvisualvm<\/code><\/li>\n\n\n\n
                  4. \u4ee3\u7801\u89e6\u53d1<\/li>\n\n\n\n
                  5. \u4f7f\u7528\u00a0JVM\u53c2\u6570<\/li>\n<\/ol>\n\n\n\n

                    \u4f7f\u7528jmap<\/code>\u5de5\u5177<\/strong><\/p>\n\n\n\n

                    \n\n\n\n

                    jmap<\/code>\u662fJDK\u81ea\u5e26\u7684\u547d\u4ee4\u884c\u5de5\u5177\uff0c\u7528\u4e8e\u751f\u6210Heap dump\u3002<\/p>\n\n\n\n

                    \u547d\u4ee4\u793a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n

                    jmap -dump:live,format=b,file=heapdump.hprof <pid><\/pre>\n\n\n\n
                    \u4f18\u70b9\uff1a<\/strong><\/p>\n\n\n\n
                      \n
                    • \u7b80\u5355\u6613\u7528<\/strong>\uff1a\u53ea\u9700\u4e00\u4e2a\u547d\u4ee4\u5373\u53ef\u751f\u6210Heap dump\u3002<\/li>\n\n\n\n
                    • \u65e0\u9700\u4fee\u6539\u5e94\u7528\u4ee3\u7801<\/strong>\uff1a\u4e0d\u9700\u8981\u5728\u4ee3\u7801\u4e2d\u6dfb\u52a0\u4efb\u4f55\u989d\u5916\u7684\u903b\u8f91\u3002<\/li>\n\n\n\n
                    • \u5b9e\u65f6\u751f\u6210<\/strong>\uff1a\u53ef\u4ee5\u5728\u5e94\u7528\u8fd0\u884c\u65f6\u751f\u6210\u5f53\u524d\u5185\u5b58\u72b6\u6001\u7684\u5feb\u7167\u3002<\/li>\n<\/ul>\n\n\n\n
                      \u7f3a\u70b9\uff1a<\/strong><\/p>\n\n\n\n
                        \n
                      • \u5bf9\u6027\u80fd\u6709\u5f71\u54cd<\/strong>\uff1a\u751f\u6210Heap dump\u8fc7\u7a0b\u4e2d\u4f1a\u6682\u505c\u5e94\u7528\uff0c\u5c24\u5176\u662f\u5927\u5806\u5185\u5b58\u7684\u5e94\u7528\uff0c\u5f71\u54cd\u4f1a\u66f4\u660e\u663e\u3002<\/li>\n\n\n\n
                      • \u9700\u8981\u6743\u9650<\/strong>\uff1a\u53ef\u80fd\u9700\u8981\u7ba1\u7406\u5458\u6743\u9650\u6765\u6267\u884c\u547d\u4ee4\u3002<\/li>\n<\/ul>\n\n\n\n
                        \u4f7f\u7528jcmd<\/code>\u5de5\u5177<\/strong><\/p>\n\n\n\n
                        \n\n\n\n
                        jcmd<\/code>\u4e5f\u662fJDK\u81ea\u5e26\u7684\u547d\u4ee4\u884c\u5de5\u5177\uff0c\u53ef\u4ee5\u6267\u884c\u591a\u79cdJVM\u8bca\u65ad\u547d\u4ee4\uff0c\u5305\u62ec\u751f\u6210Heap dump\u3002<\/p>\n\n\n\n
                        \u547d\u4ee4\u793a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n
                        jcmd <pid> GC.heap_dump heapdump.hprof<\/pre>\n\n\n\n
                        \u4f18\u70b9\uff1a<\/strong><\/p>\n\n\n\n
                          \n
                        • \u529f\u80fd\u5f3a\u5927<\/strong>\uff1ajcmd<\/code>\u4e0d\u4ec5\u80fd\u751f\u6210Heap dump\uff0c\u8fd8\u80fd\u6267\u884c\u5176\u4ed6\u8bca\u65ad\u547d\u4ee4\u3002<\/li>\n\n\n\n
                        • \u65e0\u9700\u4fee\u6539\u5e94\u7528\u4ee3\u7801<\/strong>\uff1a\u5982jmap<\/code>\u4e00\u6837\uff0c\u4e0d\u9700\u8981\u5728\u4ee3\u7801\u4e2d\u6dfb\u52a0\u4efb\u4f55\u989d\u5916\u7684\u903b\u8f91\u3002<\/li>\n<\/ul>\n\n\n\n
                          \u7f3a\u70b9\uff1a<\/strong><\/p>\n\n\n\n
                            \n
                          • \u5bf9\u6027\u80fd\u6709\u5f71\u54cd<\/strong>\uff1a\u751f\u6210Heap dump\u8fc7\u7a0b\u4e2d\u4f1a\u6682\u505c\u5e94\u7528\u3002<\/li>\n\n\n\n
                          • \u9700\u8981\u6743\u9650<\/strong>\uff1a\u53ef\u80fd\u9700\u8981\u7ba1\u7406\u5458\u6743\u9650\u6765\u6267\u884c\u547d\u4ee4\u3002<\/li>\n<\/ul>\n\n\n\n
                            \u4f7f\u7528jvisualvm<\/code><\/strong><\/p>\n\n\n\n
                            \n\n\n\n
                            jvisualvm<\/code>\u662f\u4e00\u4e2a\u56fe\u5f62\u5316\u7684\u76d1\u63a7\u548c\u8bca\u65ad\u5de5\u5177\uff0c\u53ef\u4ee5\u65b9\u4fbf\u5730\u751f\u6210Heap dump\u3002<\/p>\n\n\n\n
                            \u64cd\u4f5c\u6b65\u9aa4\uff1a<\/strong><\/p>\n\n\n\n
                              \n
                            1. \u542f\u52a8jvisualvm<\/code>\u5de5\u5177\u3002<\/li>\n\n\n\n
                            2. \u9009\u62e9\u9700\u8981\u751f\u6210Heap dump\u7684Java\u8fdb\u7a0b\u3002<\/li>\n\n\n\n
                            3. \u5728\u53f3\u952e\u83dc\u5355\u6216\u5de5\u5177\u680f\u4e2d\u9009\u62e9\u201cHeap Dump\u201d\u3002<\/li>\n<\/ol>\n\n\n\n
                              \u4f18\u70b9\uff1a<\/strong><\/p>\n\n\n\n
                                \n
                              • \u56fe\u5f62\u5316\u754c\u9762<\/strong>\uff1a\u64cd\u4f5c\u7b80\u5355\u76f4\u89c2\uff0c\u9002\u5408\u4e0d\u719f\u6089\u547d\u4ee4\u884c\u7684\u7528\u6237\u3002<\/li>\n\n\n\n
                              • \u5b9e\u65f6\u751f\u6210<\/strong>\uff1a\u53ef\u4ee5\u5728\u5e94\u7528\u8fd0\u884c\u65f6\u751f\u6210\u5f53\u524d\u5185\u5b58\u72b6\u6001\u7684\u5feb\u7167\u3002<\/li>\n<\/ul>\n\n\n\n
                                \u7f3a\u70b9\uff1a<\/strong><\/p>\n\n\n\n
                                  \n
                                • \u5bf9\u6027\u80fd\u6709\u5f71\u54cd<\/strong>\uff1a\u751f\u6210Heap dump\u8fc7\u7a0b\u4e2d\u4f1a\u6682\u505c\u5e94\u7528\u3002<\/li>\n\n\n\n
                                • \u9700\u8981\u6743\u9650<\/strong>\uff1a\u53ef\u80fd\u9700\u8981\u7ba1\u7406\u5458\u6743\u9650\u6765\u6267\u884c\u64cd\u4f5c\u3002<\/li>\n\n\n\n
                                • \u4f9d\u8d56\u56fe\u5f62\u754c\u9762<\/strong>\uff1a\u5728\u65e0\u56fe\u5f62\u754c\u9762\u7684\u670d\u52a1\u5668\u73af\u5883\u4e2d\u4f7f\u7528\u4e0d\u4fbf\u3002<\/li>\n<\/ul>\n\n\n\n
                                  \u4ee3\u7801\u89e6\u53d1<\/strong><\/p>\n\n\n\n
                                  \u53ef\u4ee5\u901a\u8fc7\u5728\u4ee3\u7801\u4e2d\u8c03\u7528HotSpotDiagnosticMXBean<\/code>\u6765\u751f\u6210Heap dump\u3002<\/p>\n\n\n\n
                                  \u4ee3\u7801\u793a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n
                                  import com.sun.management.HotSpotDiagnosticMXBean;\nimport java.lang.management.ManagementFactory;\n\npublic class HeapDumpUtil {\n    public static void dumpHeap(String filePath, boolean live) throws Exception {\n        HotSpotDiagnosticMXBean mxBean = ManagementFactory.newPlatformMXBeanProxy(\n                ManagementFactory.getPlatformMBeanServer(),\n                \"com.sun.management:type=HotSpotDiagnostic\",\n                HotSpotDiagnosticMXBean.class);\n        mxBean.dumpHeap(filePath, live);\n    }\n\n    public static void main(String[] args) throws Exception {\n        dumpHeap(\"heapdump.hprof\", true);\n    }\n}<\/pre>\n\n\n\n
                                  \u4f18\u70b9\uff1a<\/strong><\/p>\n\n\n\n
                                    \n
                                  • \u7075\u6d3b\u6027\u9ad8<\/strong>\uff1a\u53ef\u4ee5\u5728\u7279\u5b9a\u6761\u4ef6\u4e0b\u751f\u6210Heap dump\uff0c\u6bd4\u5982\u5728\u6355\u83b7\u5230\u5f02\u5e38\u65f6\u3002<\/li>\n\n\n\n
                                  • \u81ea\u52a8\u5316<\/strong>\uff1a\u53ef\u4ee5\u96c6\u6210\u5230\u5e94\u7528\u7684\u76d1\u63a7\u548c\u8bca\u65ad\u903b\u8f91\u4e2d\u3002<\/li>\n<\/ul>\n\n\n\n
                                    \u7f3a\u70b9\uff1a<\/strong><\/p>\n\n\n\n
                                      \n
                                    • \u5bf9\u6027\u80fd\u6709\u5f71\u54cd<\/strong>\uff1a\u751f\u6210Heap dump\u8fc7\u7a0b\u4e2d\u4f1a\u6682\u505c\u5e94\u7528\u3002<\/li>\n\n\n\n
                                    • \u9700\u8981\u4fee\u6539\u4ee3\u7801<\/strong>\uff1a\u9700\u8981\u5728\u4ee3\u7801\u4e2d\u6dfb\u52a0\u751f\u6210Heap dump\u7684\u903b\u8f91\u3002<\/li>\n\n\n\n
                                    • \u4f9d\u8d56\u7279\u5b9aJVM<\/strong>\uff1aHotSpotDiagnosticMXBean<\/code>\u662fHotSpot JVM\u7279\u6709\u7684\uff0c\u4e0d\u9002\u7528\u4e8e\u5176\u4ed6JVM\u5b9e\u73b0\u3002<\/li>\n<\/ul>\n\n\n\n
                                      \u4f7f\u7528 JVM\u53c2\u6570<\/strong><\/p>\n\n\n\n
                                      \n\n\n\n
                                      \u53ef\u4ee5\u901a\u8fc7\u5728JVM\u542f\u52a8\u53c2\u6570\u4e2d\u6dfb\u52a0-XX:+HeapDumpOnOutOfMemoryError<\/code>\uff0c\u5728\u53d1\u751fOutOfMemoryError<\/code>\u65f6\u81ea\u52a8\u751f\u6210Heap dump\u3002<\/p>\n\n\n\n
                                      \u793a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n
                                      java -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=\/path\/to\/dump\/ -jar myapp.jar<\/pre>\n\n\n\n
                                      \u4f18\u70b9\uff1a<\/strong><\/p>\n\n\n\n
                                        \n
                                      • \u81ea\u52a8\u5316<\/strong>\uff1a\u5728\u53d1\u751fOutOfMemoryError<\/code>\u65f6\u81ea\u52a8\u751f\u6210Heap dump\uff0c\u65e0\u9700\u4eba\u5de5\u5e72\u9884\u3002<\/li>\n\n\n\n
                                      • \u65e0\u9700\u4fee\u6539\u4ee3\u7801<\/strong>\uff1a\u53ea\u9700\u6dfb\u52a0JVM\u542f\u52a8\u53c2\u6570\u3002<\/li>\n<\/ul>\n\n\n\n
                                        \u7f3a\u70b9\uff1a<\/strong><\/p>\n\n\n\n
                                          \n
                                        • \u4ec5\u9002\u7528\u4e8eOOM<\/strong>\uff1a\u53ea\u80fd\u5728\u53d1\u751fOutOfMemoryError<\/code>\u65f6\u751f\u6210Heap dump\uff0c\u65e0\u6cd5\u7528\u4e8e\u5176\u4ed6\u60c5\u51b5\u3002<\/li>\n\n\n\n
                                        • \u5bf9\u6027\u80fd\u6709\u5f71\u54cd<\/strong>\uff1a\u751f\u6210Heap dump\u8fc7\u7a0b\u4e2d\u4f1a\u6682\u505c\u5e94\u7528\u3002<\/li>\n<\/ul>\n\n\n\n
                                          \u603b\u7ed3<\/strong><\/p>\n\n\n\n
                                          \n\n\n\n
                                          \u672c\u6587\uff0c\u6211\u4eec\u5206\u6790\u4e86\u4ec0\u4e48\u662f Heap dump\uff0cHeap dump\u5305\u542b\u7684\u4fe1\u606f\u4ee5\u53ca 5\u79cd\u751f\u6210 Heap dump\u7684\u65b9\u5f0f\uff0c\u6bcf\u79cd\u65b9\u5f0f\u90fd\u6709\u5176\u9002\u7528\u573a\u666f\u548c\u9650\u5236\uff0c\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u8fdb\u884c\u5185\u5b58\u5206\u6790\u548c\u6545\u969c\u6392\u67e5\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
                                          \u8f6c\u8f7d\uff1a\u4ec0\u4e48\u662f Heap dump\uff1fJava \u5982\u4f55\u751f\u6210 Heap dump\uff1f \u5728 Java\u4e2d\u751f\u6210 Heap du […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"_links":{"self":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/16171"}],"collection":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=16171"}],"version-history":[{"count":1,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/16171\/revisions"}],"predecessor-version":[{"id":16172,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/16171\/revisions\/16172"}],"wp:attachment":[{"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=16171"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=16171"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=16171"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}