{"id":3808,"date":"2024-05-22T08:01:01","date_gmt":"2024-05-22T00:01:01","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/index.php\/java\/%e5%a6%82%e4%bd%95%e5%bf%ab%e9%80%9f%e5%ae%9a%e4%bd%8d%e5%92%8c%e5%a4%84%e7%90%86%e7%ba%bf%e4%b8%8aoom\/"},"modified":"2024-05-24T15:13:59","modified_gmt":"2024-05-24T07:13:59","slug":"%e5%a6%82%e4%bd%95%e5%bf%ab%e9%80%9f%e5%ae%9a%e4%bd%8d%e5%92%8c%e5%a4%84%e7%90%86%e7%ba%bf%e4%b8%8aoom","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/java\/%e5%a6%82%e4%bd%95%e5%bf%ab%e9%80%9f%e5%ae%9a%e4%bd%8d%e5%92%8c%e5%a4%84%e7%90%86%e7%ba%bf%e4%b8%8aoom\/","title":{"rendered":"\u5982\u4f55\u5feb\u901f\u5b9a\u4f4d\u548c\u5904\u7406\u7ebf\u4e0aOOM"},"content":{"rendered":"
\n

\u5728\u65e5\u5e38\u7684Java\u5f00\u53d1\u4e2d\uff0c\u6709\u6548\u7684\u5185\u5b58\u7ba1\u7406\u662f\u4fdd\u8bc1\u5e94\u7528\u7a33\u5b9a\u6027\u548c\u53ef\u7528\u6027\u7684\u5173\u952e\u6307\u6807\u4e4b\u4e00\uff0c\u5982\u679c\u5185\u5b58\u4f7f\u7528\u4e0d\u5f53\u5f88\u5bb9\u6613\u5bfc\u81f4\u5185\u5b58\u7684\u6cc4\u9732\u751a\u81f3\u51fa\u73b0OOM\u3002\u5e38\u89c1\u7684\u5bfc\u81f4<\/span>OOM\u7684\u539f\u56e0\u6709\u5982\u4e0b\uff1a<\/span><\/p>\n

\uff081\uff09\u7cfb\u7edf\u7684\u672c\u8eab\u7684\u5185\u5b58\u8d44\u6e90\u4e0d\u591f<\/p>\n

\uff082\uff09\u5185\u5b58\u6cc4\u6f0f\uff08\u5982\u4e0d\u4f7f\u7528\u7684\u8d44\u6e90\u672a\u53ca\u65f6\u91ca\u653e\u4e14\u5783\u573e\u6536\u96c6\u5668\u4e5f\u65e0\u6cd5\u56de\u6536\uff09<\/p>\n

\uff083\uff09\u5927\u6570\u636e\u91cf\u5904\u7406\uff08\u5982\u505a\u5bfc\u51fa\u9700\u8981\u7684\u65f6\u5019\uff0c\u4e00\u6b21\u52a0\u8f7d\u8fc7\u591a\u7684\u6570\u636e\u5230JVM\u4e2d\uff0c\u5bfc\u81f4\u5185\u5b58\u4e0d\u8db3\uff09<\/p>\n

\u4e0b\u9762\u9488\u5bf9\u7cfb\u7edf\u8fd0\u884c\u4e2d\u8fd8\u672a\u5d29\u6e83\u65f6\u7684OOM\u3001\u7cfb\u7edf\u51fa\u73b0OOM\u4e14\u5df2\u5d29\u6e83\u7684\u573a\u666f\u505a\u5b9a\u4f4d\u548c\u5206\u6790\uff0c\u4e0b\u9762\u5199\u4e00\u6bb5\u4f1a\u53d1\u751fOOM\u7684\u4ee3\u7801\uff1a<\/p>\n

\n
public<\/span> class<\/span> JVMController<\/span> <\/span>{<\/span><\/code>    @GetMapping(\"\/add\"<\/span>)<\/span><\/span><\/code>    public<\/span> String jvmOutOfMemory() {<\/span><\/code>        List<Byte<\/span>[]> byteList = new ArrayList<>();<\/span><\/code>        for<\/span> (;;){<\/span><\/code>            byteList.add(new Byte<\/span>[1024<\/span> * 1024<\/span> * 1024<\/span>]);<\/span><\/code>        }<\/span><\/code>}<\/span><\/code>}<\/span><\/code><\/pre>\n<\/section>\n
1\u3001\u7cfb\u7edf<\/span>\u8fd0\u884c\u4e2d\u8fd8\u672a\u5d29\u6e83\u65f6\u7684<\/span>OOM<\/span><\/strong><\/p>\n
\uff081\uff09\u4f7f\u7528jmap\u5728\u7ebf\u5206\u6790<\/span><\/span><\/p>\n
\n
#\u4f7f\u7528jmap<\/span>\u5728\u7ebf\u5206\u6790-----<\/span>> jmap<\/span>-histo<\/span>:live<\/span><pid<\/span>><\/span><\/code>jmap<\/span> -histo<\/span>:live<\/span> 3512<\/span><\/code><\/pre>\n<\/section>\n
\u6b64\u65f6\u547d\u4ee4\u4f1a\u5c06\u5360\u7528\u5185\u5b58\u8f83\u5927\u7684\u5bf9\u8c61\u6253\u5370\u51fa\u6765\uff1a<\/span><\/span><\/p>\n
\u901a\u8fc7\u5728\u7ebf\u5206\u6790\u6211\u4eec\u53ef\u4ee5\u5b9a\u4f4d\u5230\u54ea\u4e9b\u5bf9\u8c61\u5360\u7528\u4e86\u5f88\u5927\u7684\u5185\u5b58\u7a7a\u95f4\uff08\u56fe\u4e2d\u7684bytes\uff09\uff0c\u6211\u4eec\u9488\u5bf9\u8fd9\u4e9b\u5bf9\u8c61\u505a\u91cd\u70b9\u7684\u5206\u6790\u3002<\/span><\/span><\/p>\n
\uff082\uff09\u5bfc\u51fa\u8fd0\u884c\u7684dump \u6587\u4ef6<\/span><\/span><\/p>\n
\n
#\u5bfc\u51fa\u6587\u4ef6<\/span><\/span><\/code>jmap<\/span>-dump:format=b,file=longxia.hprof 3512<\/span><\/code><\/pre>\n<\/section>\n
\u8fd9\u6837\u6211\u4eec\u53ef\u4ee5\u5bfc\u51fa\u4e00\u4efd\u7ebf\u4e0a\u8fd0\u884c\u7684\u65e5\u5fd7<\/span><\/span><\/p>\n
\u6b64\u65f6\u53ef\u4ee5\u5c06\u8fd9\u4efd\u65e5\u5fd7\u6570\u636e\u4e0b\u8f7d\u5230\u672c\u5730\uff0c\u7136\u540e\u901a\u8fc7\u5206\u6790\u5de5\u5177\uff08\u5982VisualVM\uff09\u505a\u5206\u6790\u3002<\/p>\n
2\u3001\u7cfb\u7edf\u53d1\u751fOOM\u4e14<\/span>\u5df2<\/span>\u5d29\u6e83<\/span><\/span><\/strong><\/p>\n
\u5982\u679c\u7cfb\u7edf\u53d1\u751f\u4e86OOM\u5e76\u4e14\u5df2\u7ecf\u5d29\u6e83\u7684\u60c5\u51b5\u4e0b\uff0c\u6b64\u65f6\u5c31\u4e0d\u80fd\u4f7f\u7528\u4e0a\u9762\u7684\u65b9\u6cd5\u5b9a\u4f4d\u4e86\uff0c\u9700\u8981\u4f7f\u7528dump\u6587\u4ef6\u6765\u5b9a\u4f4d\u539f\u56e0\u3002<\/span><\/span><\/p>\n
\uff081\uff09\u7cfb\u7edf\u5728\u542f\u52a8\u7684\u65f6\u5019\u6dfb\u52a0\u53c2\u6570<\/span><\/span><\/p>\n
\n
#\u542f\u52a8\u65f6\u6dfb\u52a0\u8fd0\u884c\u53c2\u6570-XX:+HeapDumpOnOutOfMemoryError\uff1a\u8bb0\u5f55OOM\u65e5\u5fd7-XX:HeapDumpPath\uff1a\u6587\u4ef6\u5b58\u653e\u7684\u4f4d\u7f6e<\/span><\/span><\/code>java<\/span>-jar-Xms512m-Xmx512m-XX:+HeapDumpOnOutOfMemoryError-XX:HeapDumpPath=\/usr\/localtest-1.0-SNAPSHOT.jar<\/span><\/code><\/pre>\n<\/section>\n
\u5982\u679c\u542f\u52a8\u7684\u65f6\u5019\u6dfb\u52a0HeapDumpOnOutOfMemoryError\uff0c<\/span>\u90a3\u4e48<\/span><\/span>dump\u6587\u4ef6\u4f1a\u5f88\u5927\uff0c\u56e0\u4e3a\u5b83\u8bb0\u5f55\u4e86\u7cfb\u7edf\u8fd0\u884c\u65f6\u7684\u6240\u6709\u65e5\u5fd7\u3002<\/span><\/p>\n
dump\u6587\u4ef6\u4e0b\u8f7d\u5230\u672c\u5730\uff08\u6b64\u5904\u9700\u8981\u8fd0\u7ef4\u4eba\u5458\u8f85\u52a9\u4e0b\u8f7d\u8fd9\u4e2a\u6587\u4ef6\uff09\u3002<\/span><\/span><\/p>\n
\u6587\u4ef6\u4e0b\u8f7d\u672c\u5730\u4e4b\u540e\u4f7f\u7528java\u81ea\u5e26\u7684\u5de5\u5177\u2014\u2014VisualVM\u6765\u5206\u6790\u65e5\u5fd7\u3002<\/span><\/span><\/p>\n
\u5728\u672c\u5730\u542f\u52a8VisualVM\uff1a<\/span><\/span><\/p>\n
\n
#\u8f93\u5165\u542f\u52a8VisualVM\u7684\u547d\u4ee4<\/span><\/span><\/code>jvisualvm<\/span><\/span><\/code><\/pre>\n<\/section>\n
\u542f\u52a8\u7684\u9875\u9762\uff1a<\/p>\n
\u5728VisualVM\u4e2d\u6253\u5f00\u4e0b\u8f7d\u7684OOM\u8fd0\u884c\u7684\u5f02\u5e38\u65e5\u5fd7\u6587\u4ef6\uff1a<\/p>\n
\u7ee7\u7eed\u5206\u6790\u95ee\u9898OOM\u51fa\u73b0\u7684\u539f\u56e0\uff1a<\/p>\n
\u81f3\u6b64\uff0cOOM\u5bfc\u81f4\u7cfb\u7edf\u5d29\u6e83\u7684\u540e\u539f\u56e0\u5206\u6790\u5c31\u53ef\u4ee5\u627e\u5230\u4e86\u3002<\/p>\n
4\u3001\u65e5\u5e38\u5f00\u53d1\u4e2d\u5982\u4f55\u907f\u514dOOM<\/strong><\/p>\n
\uff081\uff09\u5408\u7406\u7684\u4f7f\u7528\u8f6f\u5f15\u7528\u548c\u5f31\u5f15\u7528\uff08\u5185\u5b58\u4e0d\u8db3\u7684\u60c5\u51b5\u4f1a\u88ab\u56de\u6536\uff09<\/p>\n
\uff082\uff09\u53ca\u65f6\u91ca\u653e\u8d44\u6e90\uff08\u5982IO\u6d41\uff09<\/p>\n
\uff083\uff09\u907f\u514d\u521b\u5efa\u5927\u5bf9\u8c61<\/p>\n
\uff084\uff09\u4f18\u5316\u6570\u636e\u7ed3\u6784<\/p>\n
\uff085\uff09\u8c28\u614e\u4f7f\u7528\u5168\u5c40\u53d8\u91cf\u548c\u9759\u6001\u53d8\u91cf<\/p>\n
5\u3001OOM\u4f1a\u5bfc\u81f4\u4e00\u5b9a\u4f1a\u5bfc\u81f4\u8fdb\u7a0b\u5d29\u6e83\u5417\uff1f<\/strong><\/p>\n
\u5176\u5b9eOOM\u4e0d\u4e00\u5b9a\u4f1a\u5bfc\u81f4\u8fdb\u7a0b\u5d29\u6e83\uff0c\u4f46\u662f\u4f1a\u5bfc\u81f4\u7ebf\u7a0b\u6302\u6389\u3002\u4e0b\u9762\u6765\u9a8c\u8bc1\u4e00\u4e0b\u8fd9\u4e2a\u7ed3\u8bba\u3002<\/p>\n
\u4ee3\u7801\uff1a<\/p>\n
\n
@RestController<\/span><\/span><\/code>@RequestMapping(\"\/jvm\"<\/span>)<\/span><\/span><\/code>public<\/span> class<\/span> JVMController<\/span> <\/span>{<\/span><\/code><\/code>    @GetMapping(\"\/add\"<\/span>)<\/span><\/span><\/code>    public<\/span> String jvmOutOfMemory() {<\/span><\/code>        List<Byte<\/span>[]> byteList = new ArrayList<>();<\/span><\/code>        for<\/span> (;;){<\/span><\/code>            byteList.add(new Byte<\/span>[1024<\/span> * 1024<\/span> * 1024<\/span>]);<\/span><\/code>        }<\/span><\/code>    }<\/span><\/code><\/code>    @GetMapping(\"\/get\"<\/span>)<\/span><\/span><\/code>    public<\/span> String get<\/span>() {<\/span><\/code>       return<\/span> \"get data from java\"<\/span>;<\/span><\/code>}<\/span><\/code>}<\/span><\/code><\/pre>\n<\/section>\n
\uff081\uff09\u5148\u6267\u884c\u8bf7\u6c42http:\/\/ip:8080\/jvm\/add<\/p>\n
\u901a\u8fc7\u63a7\u5236\u53f0\u53ef\u4ee5\u53d1\u73b0\u6700\u7ec8\u662f\u51fa\u73b0\u4e86OOM\uff1a<\/p>\n
\uff082\uff09\u8bbf\u95ee\u8bf7\u6c42http:\/\/ip<\/span>:<\/span>8080<\/span>\/jvm\/get<\/span><\/p>\n
\u53ef\u4ee5\u53d1\u73b0\u8bf7\u6c42\u662f\u6b63\u5e38\u88ab\u5904\u7406\u7684\uff0c\u539f\u56e0\u662f\u8bf7\u6c42\/jvm\/get\u65f6\u5019\uff0c<\/span><\/span>\u4e0d\u9700\u8981\u518d\u53bb\u5806\u4e0a\u7533\u8bf7\u65b0\u7684\u5185\u5b58\uff0c\u6240\u4ee5\u662f\u53ef\u4ee5\u8fd0\u884c\u7684<\/span>\u3002\u8fd9\u91cc\u4e5f\u8bc1\u660eJVM\u8fdb\u7a0b\u6ca1\u6709\u9000\u51fa\u3002<\/span>\u6240\u4ee5OOM\u4e0d\u4e00\u5b9a\u4f1a\u5bfc\u81f4\u8fdb\u7a0b\u6302\u6389\uff0c\u4f46\u662f\u4f1a\u5bfc\u81f4\u5176\u7ebf\u7a0b\u6302\u6389\u3002<\/span><\/p>\n
\n
\u672c\u7bc7\u6587\u7ae0\u6765\u6e90\u4e8e\u5fae\u4fe1\u516c\u4f17\u53f7: \u9f99\u867e\u7f16\u7a0b<\/p><\/blockquote>\n<\/div>\n","raw":"","protected":false},"excerpt":{"rendered":"
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