{"id":10,"date":"2025-02-11T10:26:22","date_gmt":"2025-02-11T02:26:22","guid":{"rendered":"http:\/\/cxycd.cn\/?p=10"},"modified":"2025-02-11T10:26:22","modified_gmt":"2025-02-11T02:26:22","slug":"%e9%9d%a2%e8%af%95%e5%ae%98%ef%bc%9a%e4%bd%a0%e5%b7%a5%e4%bd%9c%e4%b8%ad%e5%81%9a%e8%bf%87-jvm-%e8%b0%83%e4%bc%98%e5%90%97%ef%bc%9f%e6%80%8e%e4%b9%88%e5%81%9a%e7%9a%84%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/cxycd.cn\/index.php\/2025\/02\/11\/%e9%9d%a2%e8%af%95%e5%ae%98%ef%bc%9a%e4%bd%a0%e5%b7%a5%e4%bd%9c%e4%b8%ad%e5%81%9a%e8%bf%87-jvm-%e8%b0%83%e4%bc%98%e5%90%97%ef%bc%9f%e6%80%8e%e4%b9%88%e5%81%9a%e7%9a%84%ef%bc%9f\/","title":{"rendered":"\u9762\u8bd5\u5b98\uff1a\u4f60\u5de5\u4f5c\u4e2d\u505a\u8fc7 JVM \u8c03\u4f18\u5417\uff1f\u600e\u4e48\u505a\u7684\uff1f"},"content":{"rendered":"\n

\u6700\u8fd1\u5f88\u591a\u5c0f\u4f19\u4f34\u8ddf\u6211\u8bf4\uff0c\u81ea\u5df1\u5b66\u4e86\u4e0d\u5c11JVM\u7684\u8c03\u4f18\u77e5\u8bc6\uff0c\u4f46\u662f\u5728\u5b9e\u9645\u5de5\u4f5c\u4e2d\u5374\u4e0d\u77e5\u9053\u4f55\u65f6\u5bf9JVM\u8fdb\u884c\u8c03\u4f18\u3002\u4eca\u5929\uff0c\u6211\u5c31\u4e3a\u5927\u5bb6\u4ecb\u7ecd\u51e0\u79cdJVM\u8c03\u4f18\u7684\u573a\u666f\u3002<\/p>\n\n\n\n

\u5728\u9605\u8bfb\u672c\u6587\u65f6\uff0c\u5047\u5b9a\u5927\u5bb6\u5df2\u7ecf\u4e86\u89e3\u4e86\u8fd0\u884c\u65f6\u7684\u6570\u636e\u533a\u57df\u548c\u5e38\u7528\u7684\u5783\u573e\u56de\u6536\u7b97\u6cd5\uff0c\u4e5f\u4e86\u89e3\u4e86Hotspot\u652f\u6301\u7684\u5783\u573e\u56de\u6536\u5668\u3002<\/p><\/blockquote>\n\n\n\n

cpu\u5360\u7528\u8fc7\u9ad8<\/h2>\n\n\n\n

cpu\u5360\u7528\u8fc7\u9ad8\u8981\u5206\u60c5\u51b5\u8ba8\u8bba\uff0c\u662f\u4e0d\u662f\u4e1a\u52a1\u4e0a\u5728\u641e\u6d3b\u52a8\uff0c\u7a81\u7136\u6709\u5927\u6279\u7684\u6d41\u91cf\u8fdb\u6765\uff0c\u800c\u4e14\u6d3b\u52a8\u7ed3\u675f\u540ecpu\u5360\u7528\u7387\u5c31\u4e0b\u964d\u4e86\uff0c\u5982\u679c\u662f\u8fd9\u79cd\u60c5\u51b5\u5176\u5b9e\u53ef\u4ee5\u4e0d\u7528\u592a\u5173\u5fc3\uff0c\u56e0\u4e3a\u8bf7\u6c42\u8d8a\u591a\uff0c\u9700\u8981\u5904\u7406\u7684\u7ebf\u7a0b\u6570\u8d8a\u591a\uff0c\u8fd9\u662f\u6b63\u5e38\u7684\u73b0\u8c61\u3002\u8bdd\u8bf4\u56de\u6765\uff0c\u5982\u679c\u4f60\u7684\u670d\u52a1\u5668\u914d\u7f6e\u672c\u8eab\u5c31\u5dee\uff0ccpu\u4e5f\u53ea\u6709\u4e00\u4e2a\u6838\u5fc3\uff0c\u8fd9\u79cd\u60c5\u51b5\uff0c\u7a0d\u5fae\u591a\u4e00\u70b9\u6d41\u91cf\u5c31\u771f\u7684\u80fd\u591f\u628a\u4f60\u7684cpu\u8d44\u6e90\u8017\u5c3d\uff0c\u8fd9\u65f6\u5e94\u8be5\u8003\u8651\u5148\u628a\u914d\u7f6e\u63d0\u5347\u5427\u3002<\/p>\n\n\n\n

\u7b2c\u4e8c\u79cd\u60c5\u51b5\uff0ccpu\u5360\u7528\u7387\u957f\u671f\u8fc7\u9ad8\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\u53ef\u80fd\u662f\u4f60\u7684\u7a0b\u5e8f\u6709\u90a3\u79cd\u5faa\u73af\u6b21\u6570\u8d85\u7ea7\u591a\u7684\u4ee3\u7801\uff0c\u751a\u81f3\u662f\u51fa\u73b0\u6b7b\u5faa\u73af\u4e86\u3002\u6392\u67e5\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n\n\n\n

\uff081\uff09\u7528top\u547d\u4ee4\u67e5\u770bcpu\u5360\u7528\u60c5\u51b5<\/p>\n\n\n\n

\"\u56fe\u7247\"\/<\/figure>\n\n\n\n

\u8fd9\u6837\u5c31\u53ef\u4ee5\u5b9a\u4f4d\u51facpu\u8fc7\u9ad8\u7684\u8fdb\u7a0b\u3002\u5728linux\u4e0b\uff0ctop\u547d\u4ee4\u83b7\u5f97\u7684\u8fdb\u7a0b\u53f7\u548cjps\u5de5\u5177\u83b7\u5f97\u7684vmid\u662f\u76f8\u540c\u7684\uff1a<\/p>\n\n\n\n

\"\u56fe\u7247\"\/<\/figure>\n\n\n\n

\uff082\uff09\u7528top -Hp\u547d\u4ee4\u67e5\u770b\u7ebf\u7a0b\u7684\u60c5\u51b5<\/p>\n\n\n\n

\"\u56fe\u7247\"\/<\/figure>\n\n\n\n

\u53ef\u4ee5\u770b\u5230\u662f\u7ebf\u7a0bid\u4e3a7287\u8fd9\u4e2a\u7ebf\u7a0b\u4e00\u76f4\u5728\u5360\u7528cpu<\/p>\n\n\n\n

\uff083\uff09\u628a\u7ebf\u7a0b\u53f7\u8f6c\u6362\u4e3a16\u8fdb\u5236<\/p>\n\n\n\n

[root@localhost ~]# printf \"%x\" 7287<\/em>
1c77<\/code><\/pre>\n\n\n\n
\u8bb0\u4e0b\u8fd9\u4e2a16\u8fdb\u5236\u7684\u6570\u5b57\uff0c\u4e0b\u9762\u6211\u4eec\u8981\u7528<\/p>\n\n\n\n
\uff084\uff09\u7528jstack\u5de5\u5177\u67e5\u770b\u7ebf\u7a0b\u6808\u60c5\u51b5<\/p>\n\n\n\n
[root@localhost ~]# jstack 7268 | grep 1c77 -A 10<\/em>
\"http-nio-8080-exec-2\" #16 daemon prio=5 os_prio=0 tid=0x00007fb66ce81000 nid=0x1c77 runnable [0x00007fb639ab9000]<\/em>
   java.lang.Thread.State: RUNNABLE
 at com.spareyaya.jvm.service.EndlessLoopService.service(EndlessLoopService.java:19)
 at com.spareyaya.jvm.controller.JVMController.endlessLoop(JVMController.java:30)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:498)
 at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190)
 at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
 at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105)<\/code><\/pre>\n\n\n\n
\u901a\u8fc7jstack\u5de5\u5177\u8f93\u51fa\u73b0\u5728\u7684\u7ebf\u7a0b\u6808\uff0c\u518d\u901a\u8fc7grep\u547d\u4ee4\u7ed3\u5408\u4e0a\u4e00\u6b65\u62ff\u5230\u7684\u7ebf\u7a0b16\u8fdb\u5236\u7684id\u5b9a\u4f4d\u5230\u8fd9\u4e2a\u7ebf\u7a0b\u7684\u8fd0\u884c\u60c5\u51b5\uff0c\u5176\u4e2djstack\u540e\u9762\u76847268\u662f\u7b2c\uff081\uff09\u6b65\u5b9a\u4f4d\u5230\u7684\u8fdb\u7a0b\u53f7\uff0cgrep\u540e\u9762\u7684\u662f\uff082\uff09\u3001\uff083\uff09\u6b65\u5b9a\u4f4d\u5230\u7684\u7ebf\u7a0b\u53f7\u3002<\/p>\n\n\n\n
\u4ece\u8f93\u51fa\u7ed3\u679c\u53ef\u4ee5\u770b\u5230\u8fd9\u4e2a\u7ebf\u7a0b\u5904\u4e8e\u8fd0\u884c\u72b6\u6001\uff0c\u5728\u6267\u884ccom.spareyaya.jvm.service.EndlessLoopService.service<\/code>\u8fd9\u4e2a\u65b9\u6cd5\uff0c\u4ee3\u7801\u884c\u53f7\u662f19\u884c\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u53bb\u5230\u4ee3\u7801\u768419\u884c\uff0c\u627e\u5230\u5176\u6240\u5728\u7684\u4ee3\u7801\u5757\uff0c\u770b\u770b\u662f\u4e0d\u662f\u5904\u4e8e\u5faa\u73af\u4e2d\uff0c\u8fd9\u6837\u5c31\u5b9a\u4f4d\u5230\u4e86\u95ee\u9898\u3002<\/p>\n\n\n\n
\u6b7b\u9501<\/h2>\n\n\n\n
\u6b7b\u9501\u5e76\u6ca1\u6709\u7b2c\u4e00\u79cd\u573a\u666f\u90a3\u4e48\u660e\u663e\uff0cweb\u5e94\u7528\u80af\u5b9a\u662f\u591a\u7ebf\u7a0b\u7684\u7a0b\u5e8f\uff0c\u5b83\u670d\u52a1\u4e8e\u591a\u4e2a\u8bf7\u6c42\uff0c\u7a0b\u5e8f\u53d1\u751f\u6b7b\u9501\u540e\uff0c\u6b7b\u9501\u7684\u7ebf\u7a0b\u5904\u4e8e\u7b49\u5f85\u72b6\u6001\uff08WAITING\u6216TIMED_WAITING\uff09\uff0c\u7b49\u5f85\u72b6\u6001\u7684\u7ebf\u7a0b\u4e0d\u5360\u7528cpu\uff0c\u6d88\u8017\u7684\u5185\u5b58\u4e5f\u5f88\u6709\u9650\uff0c\u800c\u8868\u73b0\u4e0a\u53ef\u80fd\u662f\u8bf7\u6c42\u6ca1\u6cd5\u8fdb\u884c\uff0c\u6700\u540e\u8d85\u65f6\u4e86\u3002\u5728\u6b7b\u9501\u60c5\u51b5\u4e0d\u591a\u7684\u65f6\u5019\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0d\u5bb9\u6613\u88ab\u53d1\u73b0\u3002<\/p>\n\n\n\n
\u53ef\u4ee5\u4f7f\u7528jstack\u5de5\u5177\u6765\u67e5\u770b<\/p>\n\n\n\n
\uff081\uff09jps\u67e5\u770bjava\u8fdb\u7a0b<\/p>\n\n\n\n
[root@localhost ~]# jps -l<\/em>
8737 sun.tools.jps.Jps
8682 jvm-0.0.1-SNAPSHOT.jar<\/code><\/pre>\n\n\n\n
\uff082\uff09jstack\u67e5\u770b\u6b7b\u9501\u95ee\u9898<\/p>\n\n\n\n
\u7531\u4e8eweb\u5e94\u7528\u5f80\u5f80\u4f1a\u6709\u5f88\u591a\u5de5\u4f5c\u7ebf\u7a0b\uff0c\u7279\u522b\u662f\u5728\u9ad8\u5e76\u53d1\u7684\u60c5\u51b5\u4e0b\u7ebf\u7a0b\u6570\u66f4\u591a\uff0c\u4e8e\u662f\u8fd9\u4e2a\u547d\u4ee4\u7684\u8f93\u51fa\u5185\u5bb9\u4f1a\u5341\u5206\u591a\u3002jstack\u6700\u5927\u7684\u597d\u5904\u5c31\u662f\u4f1a\u628a\u4ea7\u751f\u6b7b\u9501\u7684\u4fe1\u606f\uff08\u5305\u542b\u662f\u4ec0\u4e48\u7ebf\u7a0b\u4ea7\u751f\u7684\uff09\u8f93\u51fa\u5230\u6700\u540e\uff0c\u6240\u4ee5\u6211\u4eec\u53ea\u9700\u8981\u770b\u6700\u540e\u7684\u5185\u5bb9\u5c31\u884c\u4e86<\/p>\n\n\n\n
Java stack information for the threads listed above:
===================================================
\"Thread-4\":
 at com.spareyaya.jvm.service.DeadLockService.service2(DeadLockService.java:35)
 - waiting to lock <0x00000000f5035ae0> (a java.lang.Object)
 - locked <0x00000000f5035af0> (a java.lang.Object)
 at com.spareyaya.jvm.controller.JVMController.lambda$deadLock$1(JVMController.java:41)
 at com.spareyaya.jvm.controller.JVMController$$Lambda$457\/1776922136.run(Unknown Source)
 at java.lang.Thread.run(Thread.java:748)
\"Thread-3\":
 at com.spareyaya.jvm.service.DeadLockService.service1(DeadLockService.java:27)
 - waiting to lock <0x00000000f5035af0> (a java.lang.Object)
 - locked <0x00000000f5035ae0> (a java.lang.Object)
 at com.spareyaya.jvm.controller.JVMController.lambda$deadLock$0(JVMController.java:37)
 at com.spareyaya.jvm.controller.JVMController$$Lambda$456\/474286897.run(Unknown Source)
 at java.lang.Thread.run(Thread.java:748)

Found 1 deadlock.<\/code><\/pre>\n\n\n\n
\u53d1\u73b0\u4e86\u4e00\u4e2a\u6b7b\u9501\uff0c\u539f\u56e0\u4e5f\u4e00\u76ee\u4e86\u7136\u3002<\/p>\n\n\n\n
\u5185\u5b58\u6cc4\u6f0f<\/h2>\n\n\n\n
\u6211\u4eec\u90fd\u77e5\u9053\uff0cjava\u548cc++\u7684\u6700\u5927\u533a\u522b\u662f\u524d\u8005\u4f1a\u81ea\u52a8\u6536\u56de\u4e0d\u518d\u4f7f\u7528\u7684\u5185\u5b58\uff0c\u540e\u8005\u9700\u8981\u7a0b\u5e8f\u5458\u624b\u52a8\u91ca\u653e\u3002\u5728c++\u4e2d\uff0c\u5982\u679c\u6211\u4eec\u5fd8\u8bb0\u91ca\u653e\u5185\u5b58\u5c31\u4f1a\u53d1\u751f\u5185\u5b58\u6cc4\u6f0f\u3002\u4f46\u662f\uff0c\u4e0d\u8981\u4ee5\u4e3ajvm\u5e2e\u6211\u4eec\u56de\u6536\u4e86\u5185\u5b58\u5c31\u4e0d\u4f1a\u51fa\u73b0\u5185\u5b58\u6cc4\u6f0f\u3002<\/p>\n\n\n\n
\u7a0b\u5e8f\u53d1\u751f\u5185\u5b58\u6cc4\u6f0f\u540e\uff0c\u8fdb\u7a0b\u7684\u53ef\u7528\u5185\u5b58\u4f1a\u6162\u6162\u53d8\u5c11\uff0c\u6700\u540e\u7684\u7ed3\u679c\u5c31\u662f\u629b\u51faOOM\u9519\u8bef\u3002\u53d1\u751fOOM\u9519\u8bef\u540e\u53ef\u80fd\u4f1a\u60f3\u5230\u662f\u5185\u5b58\u4e0d\u591f\u5927\uff0c\u4e8e\u662f\u628a-Xmx\u53c2\u6570\u8c03\u5927\uff0c\u7136\u540e\u91cd\u542f\u5e94\u7528\u3002\u8fd9\u4e48\u505a\u7684\u7ed3\u679c\u5c31\u662f\uff0c\u8fc7\u4e86\u4e00\u6bb5\u65f6\u95f4\u540e\uff0cOOM\u4f9d\u7136\u4f1a\u51fa\u73b0\u3002\u6700\u540e\u65e0\u6cd5\u518d\u8c03\u5927\u6700\u5927\u5806\u5185\u5b58\u4e86\uff0c\u7ed3\u679c\u5c31\u662f\u53ea\u80fd\u6bcf\u9694\u4e00\u6bb5\u65f6\u95f4\u91cd\u542f\u4e00\u4e0b\u5e94\u7528\u3002<\/p>\n\n\n\n
\u5185\u5b58\u6cc4\u6f0f\u7684\u53e6\u4e00\u4e2a\u53ef\u80fd\u7684\u8868\u73b0\u662f\u8bf7\u6c42\u7684\u54cd\u5e94\u65f6\u95f4\u53d8\u957f\u4e86\u3002\u8fd9\u662f\u56e0\u4e3a\u9891\u7e41\u53d1\u751f\u7684GC\u4f1a\u6682\u505c\u5176\u5b83\u6240\u6709\u7ebf\u7a0b\uff08Stop The World\uff09\u9020\u6210\u7684\u3002<\/p>\n\n\n\n
\u4e3a\u4e86\u6a21\u62df\u8fd9\u4e2a\u573a\u666f\uff0c\u4f7f\u7528\u4e86\u4ee5\u4e0b\u7684\u7a0b\u5e8f<\/p>\n\n\n\n
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class Main {
    public static void main(String[] args) {
        Main main = new Main();
        while (true) {
            try {
                Thread.sleep(1);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            main.run();
        }
    }

    private void run() {
        ExecutorService executorService = Executors.newCachedThreadPool();
        for (int i = 0; i < 10; i++) {
            executorService.execute(() -> {
                \/\/ do something...
            });
        }
    }
}<\/code><\/pre>\n\n\n\n
\u8fd0\u884c\u53c2\u6570\u662f-Xms20m -Xmx20m -XX:+PrintGC<\/code>\uff0c\u628a\u53ef\u7528\u5185\u5b58\u8c03\u5c0f\u4e00\u70b9\uff0c\u5e76\u4e14\u5728\u53d1\u751fgc\u65f6\u8f93\u51fa\u4fe1\u606f\uff0c\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b<\/p>\n\n\n\n
...
[GC (Allocation Failure)  12776K->10840K(18432K), 0.0309510 secs]
[GC (Allocation Failure)  13400K->11520K(18432K), 0.0333385 secs]
[GC (Allocation Failure)  14080K->12168K(18432K), 0.0332409 secs]
[GC (Allocation Failure)  14728K->12832K(18432K), 0.0370435 secs]
[Full GC (Ergonomics)  12832K->12363K(18432K), 0.1942141 secs]
[Full GC (Ergonomics)  14923K->12951K(18432K), 0.1607221 secs]
[Full GC (Ergonomics)  15511K->13542K(18432K), 0.1956311 secs]
...
[Full GC (Ergonomics)  16382K->16381K(18432K), 0.1734902 secs]
[Full GC (Ergonomics)  16383K->16383K(18432K), 0.1922607 secs]
[Full GC (Ergonomics)  16383K->16383K(18432K), 0.1824278 secs]
[Full GC (Allocation Failure)  16383K->16383K(18432K), 0.1710382 secs]
[Full GC (Ergonomics)  16383K->16382K(18432K), 0.1829138 secs]
[Full GC (Ergonomics) Exception in thread \"main\"  16383K->16382K(18432K), 0.1406222 secs]
[Full GC (Allocation Failure)  16382K->16382K(18432K), 0.1392928 secs]
[Full GC (Ergonomics)  16383K->16382K(18432K), 0.1546243 secs]
[Full GC (Ergonomics)  16383K->16382K(18432K), 0.1755271 secs]
[Full GC (Ergonomics)  16383K->16382K(18432K), 0.1699080 secs]
[Full GC (Allocation Failure)  16382K->16382K(18432K), 0.1697982 secs]
[Full GC (Ergonomics)  16383K->16382K(18432K), 0.1851136 secs]
[Full GC (Allocation Failure)  16382K->16382K(18432K), 0.1655088 secs]
java.lang.OutOfMemoryError: Java heap space<\/code><\/pre>\n\n\n\n
\u53ef\u4ee5\u770b\u5230\u867d\u7136\u4e00\u76f4\u5728gc\uff0c\u5360\u7528\u7684\u5185\u5b58\u5374\u8d8a\u6765\u8d8a\u591a\uff0c\u8bf4\u660e\u7a0b\u5e8f\u6709\u7684\u5bf9\u8c61\u65e0\u6cd5\u88ab\u56de\u6536\u3002\u4f46\u662f\u4e0a\u9762\u7684\u7a0b\u5e8f\u5bf9\u8c61\u90fd\u662f\u5b9a\u4e49\u5728\u65b9\u6cd5\u5185\u7684\uff0c\u5c5e\u4e8e\u5c40\u90e8\u53d8\u91cf\uff0c\u5c40\u90e8\u53d8\u91cf\u5728\u65b9\u6cd5\u8fd0\u884c\u7ed3\u679c\u540e\uff0c\u6240\u5f15\u7528\u7684\u5bf9\u8c61\u5728gc\u65f6\u5e94\u8be5\u88ab\u56de\u6536\u554a\uff0c\u4f46\u662f\u8fd9\u91cc\u660e\u663e\u6ca1\u6709\u3002<\/p>\n\n\n\n
\u4e3a\u4e86\u627e\u51fa\u5230\u5e95\u662f\u54ea\u4e9b\u5bf9\u8c61\u6ca1\u80fd\u88ab\u56de\u6536\uff0c\u6211\u4eec\u52a0\u4e0a\u8fd0\u884c\u53c2\u6570-XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=heap.bin<\/code>\uff0c\u610f\u601d\u662f\u53d1\u751fOOM\u65f6\u628a\u5806\u5185\u5b58\u4fe1\u606fdump\u51fa\u6765\u3002\u8fd0\u884c\u7a0b\u5e8f\u76f4\u81f3\u5f02\u5e38\uff0c\u4e8e\u662f\u5f97\u5230heap.dump\u6587\u4ef6\uff0c\u7136\u540e\u6211\u4eec\u501f\u52a9eclipse\u7684MAT\u63d2\u4ef6\u6765\u5206\u6790\uff0c\u5982\u679c\u6ca1\u6709\u5b89\u88c5\u9700\u8981\u5148\u5b89\u88c5\u3002<\/p>\n\n\n\n
\u7136\u540eFile->Open Heap Dump… \uff0c\u7136\u540e\u9009\u62e9\u521a\u624ddump\u51fa\u6765\u7684\u6587\u4ef6\uff0c\u9009\u62e9Leak Suspects<\/p>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n
\u56fe\u7247<\/p>\n\n\n\n
MAT\u4f1a\u5217\u51fa\u6240\u6709\u53ef\u80fd\u53d1\u751f\u5185\u5b58\u6cc4\u6f0f\u7684\u5bf9\u8c61<\/p>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n
\u53ef\u4ee5\u770b\u5230\u5c45\u7136\u670921260\u4e2aThread\u5bf9\u8c61\uff0c3386\u4e2aThreadPoolExecutor\u5bf9\u8c61\uff0c\u5982\u679c\u4f60\u53bb\u770b\u4e00\u4e0bjava.util.concurrent.ThreadPoolExecutor<\/code>\u7684\u6e90\u7801\uff0c\u53ef\u4ee5\u53d1\u73b0\u7ebf\u7a0b\u6c60\u4e3a\u4e86\u590d\u7528\u7ebf\u7a0b\uff0c\u4f1a\u4e0d\u65ad\u5730\u7b49\u5f85\u65b0\u7684\u4efb\u52a1\uff0c\u7ebf\u7a0b\u4e5f\u4e0d\u4f1a\u56de\u6536\uff0c\u9700\u8981\u8c03\u7528\u5176shutdown()<\/code>\u65b9\u6cd5\u624d\u80fd\u8ba9\u7ebf\u7a0b\u6c60\u6267\u884c\u5b8c\u4efb\u52a1\u540e\u505c\u6b62\u3002<\/p>\n\n\n\n
\u5176\u5b9e\u7ebf\u7a0b\u6c60\u5b9a\u4e49\u6210\u5c40\u90e8\u53d8\u91cf\uff0c\u597d\u7684\u505a\u6cd5\u662f\u8bbe\u7f6e\u6210\u5355\u4f8b\u3002<\/p>\n\n\n\n
\u4e0a\u9762\u53ea\u662f\u5176\u4e2d\u4e00\u79cd\u5904\u7406\u65b9\u6cd5<\/p>\n\n\n\n
\u5728\u7ebf\u4e0a\u7684\u5e94\u7528\uff0c\u5185\u5b58\u5f80\u5f80\u4f1a\u8bbe\u7f6e\u5f97\u5f88\u5927\uff0c\u8fd9\u6837\u53d1\u751fOOM\u518d\u628a\u5185\u5b58\u5feb\u7167dump\u51fa\u6765\u7684\u6587\u4ef6\u5c31\u4f1a\u5f88\u5927\uff0c\u53ef\u80fd\u5927\u5230\u5728\u672c\u5730\u7684\u7535\u8111\u4e2d\u5df2\u7ecf\u65e0\u6cd5\u5206\u6790\u4e86\uff08\u56e0\u4e3a\u5185\u5b58\u4e0d\u8db3\u591f\u6253\u5f00\u8fd9\u4e2adump\u6587\u4ef6\uff09\u3002\u8fd9\u91cc\u4ecb\u7ecd\u53e6\u4e00\u79cd\u5904\u7406\u529e\u6cd5\uff1a<\/p>\n\n\n\n
\uff081\uff09\u7528jps\u5b9a\u4f4d\u5230\u8fdb\u7a0b\u53f7<\/p>\n\n\n\n
C:\\Users\\spareyaya\\IdeaProjects\\maven-project\\target\\classes\\org\\example\\net>jps -l
24836 org.example.net.Main
62520 org.jetbrains.jps.cmdline.Launcher
129980 sun.tools.jps.Jps
136028 org.jetbrains.jps.cmdline.Launcher<\/code><\/pre>\n\n\n\n
\u56e0\u4e3a\u5df2\u7ecf\u77e5\u9053\u4e86\u662f\u54ea\u4e2a\u5e94\u7528\u53d1\u751f\u4e86OOM\uff0c\u8fd9\u6837\u53ef\u4ee5\u76f4\u63a5\u7528jps\u627e\u5230\u8fdb\u7a0b\u53f7135988<\/p>\n\n\n\n
\uff082\uff09\u7528jstat\u5206\u6790gc\u6d3b\u52a8\u60c5\u51b5<\/p>\n\n\n\n
jstat\u662f\u4e00\u4e2a\u7edf\u8ba1java\u8fdb\u7a0b\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\u548cgc\u6d3b\u52a8\u7684\u5de5\u5177\uff0c\u53c2\u6570\u53ef\u4ee5\u6709\u5f88\u591a\uff0c\u53ef\u4ee5\u901a\u8fc7jstat -help<\/code>\u67e5\u770b\u6240\u6709\u53c2\u6570\u4ee5\u53ca\u542b\u4e49<\/p>\n\n\n\n
C:\\Users\\spareyaya\\IdeaProjects\\maven-project\\target\\classes\\org\\example\\net>jstat -gcutil -t -h8 24836 1000
Timestamp         S0     S1     E      O      M     CCS    YGC     YGCT    FGC    FGCT     GCT
           29.1  32.81   0.00  23.48  85.92  92.84  84.13     14    0.339     0    0.000    0.339
           30.1  32.81   0.00  78.12  85.92  92.84  84.13     14    0.339     0    0.000    0.339
           31.1   0.00   0.00  22.70  91.74  92.72  83.71     15    0.389     1    0.233    0.622<\/code><\/pre>\n\n\n\n
\u4e0a\u9762\u662f\u547d\u4ee4\u610f\u601d\u662f\u8f93\u51fagc\u7684\u60c5\u51b5\uff0c\u8f93\u51fa\u65f6\u95f4\uff0c\u6bcf8\u884c\u8f93\u51fa\u4e00\u4e2a\u884c\u5934\u4fe1\u606f\uff0c\u7edf\u8ba1\u7684\u8fdb\u7a0b\u53f7\u662f24836\uff0c\u6bcf1000\u6beb\u79d2\u8f93\u51fa\u4e00\u6b21\u4fe1\u606f\u3002<\/p>\n\n\n\n
\u8f93\u51fa\u4fe1\u606f\u662fTimestamp\u662f\u8ddd\u79bbjvm\u542f\u52a8\u7684\u65f6\u95f4\uff0cS0\u3001S1\u3001E\u662f\u65b0\u751f\u4ee3\u7684\u4e24\u4e2aSurvivor\u548cEden\uff0cO\u662f\u8001\u5e74\u4ee3\u533a\uff0cM\u662fMetaspace\uff0cCCS\u4f7f\u7528\u538b\u7f29\u6bd4\u4f8b\uff0cYGC\u548cYGCT\u5206\u522b\u662f\u65b0\u751f\u4ee3gc\u7684\u6b21\u6570\u548c\u65f6\u95f4\uff0cFGC\u548cFGCT\u5206\u522b\u662f\u8001\u5e74\u4ee3gc\u7684\u6b21\u6570\u548c\u65f6\u95f4\uff0cGCT\u662fgc\u7684\u603b\u65f6\u95f4\u3002\u867d\u7136\u53d1\u751f\u4e86gc\uff0c\u4f46\u662f\u8001\u5e74\u4ee3\u5185\u5b58\u5360\u7528\u7387\u6839\u672c\u6ca1\u4e0b\u964d\uff0c\u8bf4\u660e\u6709\u7684\u5bf9\u8c61\u6ca1\u6cd5\u88ab\u56de\u6536\uff08\u5f53\u7136\u4e5f\u4e0d\u6392\u9664\u8fd9\u4e9b\u5bf9\u8c61\u771f\u7684\u662f\u6709\u7528\uff09\u3002<\/p>\n\n\n\n
\uff083\uff09\u7528jmap\u5de5\u5177dump\u51fa\u5185\u5b58\u5feb\u7167<\/p>\n\n\n\n
jmap\u53ef\u4ee5\u628a\u6307\u5b9ajava\u8fdb\u7a0b\u7684\u5185\u5b58\u5feb\u7167dump\u51fa\u6765\uff0c\u6548\u679c\u548c\u7b2c\u4e00\u79cd\u5904\u7406\u529e\u6cd5\u4e00\u6837\uff0c\u4e0d\u540c\u7684\u662f\u5b83\u4e0d\u7528\u7b49OOM\u5c31\u53ef\u4ee5\u505a\u5230\uff0c\u800c\u4e14dump\u51fa\u6765\u7684\u5feb\u7167\u4e5f\u4f1a\u5c0f\u5f88\u591a\u3002<\/p>\n\n\n\n
jmap -dump:live,format=b,file=heap.bin 24836<\/code><\/pre>\n\n\n\n
\u8fd9\u65f6\u4f1a\u5f97\u5230heap.bin\u7684\u5185\u5b58\u5feb\u7167\u6587\u4ef6\uff0c\u7136\u540e\u5c31\u53ef\u4ee5\u7528eclipse\u6765\u5206\u6790\u4e86\u3002<\/p>\n\n\n\n
\u603b\u7ed3<\/h2>\n\n\n\n
\u4ee5\u4e0a\u4e09\u79cd\u4e25\u683c\u5730\u8bf4\u8fd8\u7b97\u4e0d\u4e0ajvm\u7684\u8c03\u4f18\uff0c\u53ea\u662f\u7528\u4e86jvm\u5de5\u5177\u628a\u4ee3\u7801\u4e2d\u5b58\u5728\u7684\u95ee\u9898\u627e\u4e86\u51fa\u6765\u3002\u6211\u4eec\u8fdb\u884cjvm\u7684\u4e3b\u8981\u76ee\u7684\u662f\u5c3d\u91cf\u51cf\u5c11\u505c\u987f\u65f6\u95f4\uff0c\u63d0\u9ad8\u7cfb\u7edf\u7684\u541e\u5410\u91cf\u3002<\/p>\n\n\n\n
\u4f46\u662f\u5982\u679c\u6211\u4eec\u6ca1\u6709\u5bf9\u7cfb\u7edf\u8fdb\u884c\u5206\u6790\u5c31\u76f2\u76ee\u53bb\u8bbe\u7f6e\u5176\u4e2d\u7684\u53c2\u6570\uff0c\u53ef\u80fd\u4f1a\u5f97\u5230\u66f4\u574f\u7684\u7ed3\u679c\uff0cjvm\u53d1\u5c55\u5230\u4eca\u5929\uff0c\u5404\u79cd\u9ed8\u8ba4\u7684\u53c2\u6570\u53ef\u80fd\u662f\u5b9e\u9a8c\u5ba4\u7684\u4eba\u7ecf\u8fc7\u591a\u6b21\u7684\u6d4b\u8bd5\u6765\u505a\u5e73\u8861\u7684\uff0c\u9002\u7528\u5927\u591a\u6570\u7684\u5e94\u7528\u573a\u666f\u3002\u5982\u679c\u4f60\u8ba4\u4e3a\u4f60\u7684jvm\u786e\u5b9e\u6709\u8c03\u4f18\u7684\u5fc5\u8981\uff0c\u4e5f\u52a1\u5fc5\u8981\u53d6\u6837\u5206\u6790\uff0c\u6700\u540e\u8fd8\u5f97\u6162\u6162\u591a\u6b21\u8c03\u8282\uff0c\u624d\u6709\u53ef\u80fd\u5f97\u5230\u66f4\u4f18\u7684\u6548\u679c\u3002<\/p>\n\n\n\n
\u6765\u6e90\uff1acnblogs.com\/sppareyaya\/p\/13174003.html
\u6700\u65b0<\/strong>\u6574\u7406\uff1a\ud83d\udd13CSDN\u4f1a\u5458\u514d\u8d39\u7535\u5b50\u4e661000\u672c\u3001\ud83d\udda5\u9ed1\u5ba2\u6280\u672f\u5b66\u4e60\u4e66\u7c4d\u5927\u5408\u96c6\u3001\ud83d\udcbb\u8ba1\u7b97\u673a\u6280\u672f\u4e13\u9898\u4e66\u7c4d\u301069GB\u3011\u300160\u591a\u95e8\u7f16\u7a0b\u8bed\u8a00\u5b66\u4e60\u4e66\u7c4d\u8d85\u7ea7\u5927\u5408\u96c6\uff08700+\u672cPDF\uff09\u3001\ud83d\udda5\u8ba1\u7b97\u673a\u4e8c\u7ea7\u4e13\u9898\u3010183GB\u3011\u7b49\u7f16\u7a0b\u5408\u96c6\uff01
\"\u56fe\u7247\"<\/pre>\n","protected":false},"excerpt":{"rendered":"
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