{"id":555494,"date":"2022-02-23T16:51:33","date_gmt":"2022-02-23T08:51:33","guid":{"rendered":"http:\/\/4563.org\/?p=555494"},"modified":"2022-02-23T16:51:33","modified_gmt":"2022-02-23T08:51:33","slug":"%e5%8f%af%e5%a4%8d%e7%8e%b0%e7%9a%84-java-%e8%bf%9b%e7%a8%8b%e5%8d%a1%e6%ad%bb%ef%bc%8c%e5%a6%82%e4%bd%95%e6%8e%92%e6%9f%a5%e9%97%ae%e9%a2%98-6","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=555494","title":{"rendered":"\u53ef\u590d\u73b0\u7684 Java \u8fdb\u7a0b\u5361\u6b7b\uff0c\u5982\u4f55\u6392\u67e5\u95ee\u9898"},"content":{"rendered":"
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\u53ef\u590d\u73b0\u7684 Java \u8fdb\u7a0b\u5361\u6b7b\uff0c\u5982\u4f55\u6392\u67e5\u95ee\u9898 <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : nonoyang <\/span> <\/i> 24<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u573a\u666f\uff1a\u6709\u4e00\u4e2a\u5355\u72ec\u7684\u670d\u52a1\uff0c\u7528\u4e8e\u6d4b\u8bd5\u4e00\u4e2a\u5927\u7684\u5b9a\u65f6\u4efb\u52a1(\u5305\u542b\u5927\u91cf\u8bfb\u5199\u64cd\u4f5c)\uff0c\u5b9a\u65f6\u4efb\u52a1\u8fd0\u884c\u5927\u6982 30 \u5206\u949f\u540e\uff0c\u4f1a\u51fa\u73b0\u5361\u6b7b\u60c5\u51b5\u3002Java \u8fdb\u7a0b\u8fd8\u5b58\u5728\u4f46\u5904\u4e8e\u6682\u505c\u72b6\u6001\u3002\u65e5\u5fd7\u505c\u6b62\u8f93\u51fa\uff0c\u4e14\u6ca1\u6709\u4efb\u4f55\u62a5\u9519\u3002<\/p>\n

\u8fdb\u7a0b\u4fe1\u606f\uff1a PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 8831 **** 20 0 9781344 2.491g 14912 t 0.0 8.0 23:50.15 java<\/p>\n

gc \u90e8\u5206\u65e5\u5fd7\uff1a 2021-11-24T09:43:51.293+0800: 58343.178: [GC (Allocation Failure) [PSYoungGen: 1045888K->416K(1047552K)] 1379025K->333593K(2096128K), 0.0061813 secs] [Times: user=0.02 sys=0.01, real=0.01 secs] 2021-11-24T09:44:37.862+0800: 58389.746: [GC (Allocation Failure) [PSYoungGen: 1046944K->288K(1047552K)] 1380121K->333473K(2096128K), 0.0063377 secs] [Times: user=0.01 sys=0.00, real=0.01 secs] 2021-11-24T09:45:23.641+0800: 58435.526: [GC (Allocation Failure) [PSYoungGen: 1046816K->387K(1047552K)] 1380001K->333597K(2096128K), 0.0063043 secs] [Times: user=0.02 sys=0.00, real=0.01 secs]<\/p>\n

\u5361\u6b7b\u540e\uff0cjmap,jstack \u76f8\u5173\u6307\u4ee4\u90fd\u65e0\u6cd5\u518d\u6267\u884c\u4e86\u3002 \u6570\u636e\u5e93\u7528\u7684\u662f oracle 12c,\u67e5\u770b\u8fd8\u662f\u6b63\u5e38\u7684\uff0c\u6240\u4ee5\u5e94\u8be5\u4e0d\u662f\u6570\u636e\u5e93\u7684\u95ee\u9898\u3002 \u8bf7\u95ee\u5927\u4f6c\u4eec\uff0c\u73b0\u5728\u6709\u5565\u6392\u67e5\u95ee\u9898\u7684\u624b\u6bb5\u5417\uff1f<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (18<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : darrh00 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4ec0\u4e48\u73af\u5883\uff1f
    \u5982\u679c\u662f Linux \u7684\u8bdd\u53ef\u4ee5\u8bd5\u8bd5 kill -QUIT pid <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : yanweichen0720 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u542f\u52a8\u7684\u65f6\u5019\u52a0\u4e0a\u8fdc\u7a0b\u76d1\u63a7\u7684\u53c2\u6570\uff0c\u7136\u540e\u7528 jmc \u5b9e\u65f6\u770b\u4e0b\u5177\u4f53\u54ea\u4e9b\u7c7b\u70b8\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : nonoyang <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @darrh00 \u662f linux <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : huntagain2008 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5efa\u8bae\u8ffd\u52a0\u9644\u8a00\u7528 markdown \u7684\u4ee3\u7801\u5757\u628a\u8fdb\u7a0b\u4fe1\u606f\u548c\u65e5\u5fd7\u663e\u793a\u7684\u6f02\u4eae\u70b9\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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    \u8cc7\u6df1\u5927\u4f6c : whx <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u770b\u8d77\u6765\u662f\u5185\u5b58\u6ee1\u4e86\u4e0d\u591f\u7528\u5bfc\u81f4\u7684\uff0c\u53ef\u4ee5\u628a-Xmx \u8c03\u5927\u4e00\u70b9\u8bd5\u4e0b\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : cheng6563 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    -XX:+ExitOnOutOfMemoryError -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=12345.hprof
    \u52a0\u8fd9\u4ee8\u53c2\u6570\uff0c\u4f7f\u5176\u53d1\u751f\u5185\u5b58\u95ee\u9898\u65f6\u76f4\u63a5\u9000\u51fa\u5e76\u7559\u4e0b dump \uff0c\u7136\u540e\u5206\u6790 dump \u5c31\u884c\u4e86\u3002
    java \u53d1\u751f OOM \u9519\u8bef\u65f6\u5f88\u5bb9\u6613\u5931\u63a7\uff0c\u4e0d\u9000\u51fa\u4e5f\u5f80\u5f80\u4e0d\u80fd\u6b63\u5e38\u5de5\u4f5c\uff0c\u8fd8\u4e0d\u5982\u76f4\u63a5\u9000\u6389\u8ba9\u5b88\u62a4\u8fdb\u7a0b\u91cd\u65b0\u62c9\u8d77\u6765\u4e86\u4e8b\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : zxyroy <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u53ef\u4ee5\u6392\u67e5\u4e0b\u662f\u4e0d\u662f\u6709\u4ec0\u4e48 stream \u5fd8\u8bb0 close \u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : nonoyang <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @zxyroy \u8fd9\u4e2a\u5e94\u8be5\u662f\u4e0d\u5b58\u5728\u7684\u3002\u8fd9\u4e2a\u4efb\u52a1\u53ea\u662f\u5faa\u73af\u5bf9\u4e00\u4e9b\u6570\u636e\u8fdb\u884c\u76f8\u5173\u7684\u67e5\u8be2\uff0c\u5e76\u505a\u540e\u7eed\u7684 insert \u3002\u53ea\u662f\u6570\u636e\u91cf\u5f88\u5927\uff0c\u5e76\u4e14\u6bcf\u4e2a\u6570\u636e\u8981\u505a\u7684\u5bf9\u5e94\u67e5\u8be2\u4e5f\u5f88\u591a\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : nonoyang <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @whx \u8fd9\u4e2a\u4e4b\u524d\u5df2\u7ecf\u8c03\u9ad8\u8fc7\u4e00\u6b21\u4e86\u3002\u73b0\u5728\u662f-Xms2g -Xmx2g -Xmn1g -XX:MetaspaceSize=256m
    -XX:MaxMetaspaceSize=512m <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : nonoyang <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @cheng6563 \u8fd9\u4e2a\u6211\u8bd5\u4e0b\u3002\u4e4b\u524d\u662f\u60f3\u7b49\u6302\u6389\u7684\u65f6\u5019\u518d\u53bb\u62ff\u5185\u5b58\u5feb\u7167\uff0c\u4f46\u540e\u6765\u8bd5\u4e86\u4e24\u6b21\uff0c\u53d1\u73b0\u8fdb\u7a0b\u76f4\u63a5\u65e0\u54cd\u5e94\u4e86\u3002\u3002\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : fengpan567 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u662f\u4e0d\u662f\u6587\u4ef6\u6d41\u6ca1\u5173\uff0c\u670d\u52a1\u5668\u4e0a ulimit -n \u68c0\u67e5\u4e00\u4e0b\u6253\u5f00\u6587\u4ef6\u6570\u7684\u9650\u5236\u662f\u591a\u5c11 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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    \u8cc7\u6df1\u5927\u4f6c : ChovyChu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    jstat -gc pid 1000 \u770b\u4e00\u4e0b gc \u9891\u7387\u5427\uff0c\u5361\u4f4f\u5927\u6982\u7387\u662f\u7ecf\u5e38 fgc \u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : nonoyang <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @ChovyChu \u6d4b\u8bd5\u4e86\u51e0\u6b21\uff0c\u53d1\u751f\u4e86 1 \u30012 \u6b21 full gc \uff0c\u6211\u4e0d\u592a\u6e05\u695a\u8fd9\u4e2a\u9891\u7387\u662f\u5426\u8fc7\u9ad8\u3002gc \u65e5\u5fd7\u6211\u662f\u6709\u8bb0\u5f55\u7684\uff0c\u5e73\u5747 40s \u5230 1 \u5206\u591a\u949f\u5de6\u53f3\u6267\u884c\u4e00\u6b21\u65b0\u751f\u4ee3\u7684 gc \u3002full gc \u7684\u8bb0\u5f55\uff1a
    [Full GC (System.gc())
    [PSYoungGen: 8519K->0K(958976K)]
    [ParOldGen: 83126K->75678K(1048576K)]
    91646K->75678K(2007552K),
    [Metaspace: 39477K->39477K(1083392K)],
    0.4594062 secs]
    [Times: user=3.28 sys=0.02, real=0.45 secs] <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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    \u8cc7\u6df1\u5927\u4f6c : huang119412 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4ec0\u4e48\u90fd\u4e0d\u8bf4\uff0c\u600e\u4e48\u6392\u67e5\uff0c\u6d4b\u8bd5\u673a\u914d\u7f6e\u548c os \u7248\u672c\uff0cjava \u7248\u672c\uff0c\u6846\u67b6\u7b49\u3002\u8fd8\u6709\u7cfb\u7edf\u4ec0\u4e48\u72b6\u6001\uff1f\u4ece Full GC (System.gc())\u770b\uff0c\u8fd9\u5e94\u8be5\u56de\u6536\u5806\u5916\u5185\u5b58\u7528\u7684\u3002IO \u5b9a\u65f6\u4efb\u52a1 CPU \u4e00\u822c\u5360\u7528\u4e0d\u4f1a\u9ad8\uff0c\u6700\u5927\u53ef\u80fd\u51fa\u73b0\u5728\u5185\u5b58\u548c\u78c1\u76d8\u3002\u6211\u7684\u4e00\u4e2a\u7ecf\u9a8c\u662f\uff0c\u4ee5\u524d\u6211\u4eec\u6d4b\u8bd5\u673a\u7528\u7684\u662f\u673a\u68b0\u76d8\uff0c\u6570\u636e\u5e93\u64cd\u4f5c\u591a\uff08\u968f\u673a\uff09\u7684\u65f6\u5019\uff0c\u78c1\u76d8\u7ecf\u5e38\u65e0\u54cd\u5e94\uff0c\u9020\u6210\u7a0b\u5e8f\u5047\u6b7b\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : xylxAdai <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    strace \uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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    \u8cc7\u6df1\u5927\u4f6c : zeni123 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5e94\u8be5\u5c31\u662f\u5185\u5b58\u7528\u591a\u4e86\u5427 ParallelGC STW \u592a\u957f\u4e86\u3002\u589e\u52a0\u6216\u8005\u51cf\u5c11\u5806\u5185\u5b58\u770b\u770b\u4ece\u8fd0\u884c\u65f6\u95f4\u5361\u6b7b\u4f1a\u4e0d\u4f1a\u53d8\u5316\u3002
    \u8fd9\u662f java \u51e0\uff0c\u53ef\u4ee5\u6362\u7528 G1 \u5417\uff0c\u6362\u5783\u573e\u56de\u6536\u5668\u89e3\u51b3\u4e0d\u4e86\u5361\u6b7b\u95ee\u9898\uff0c\u4f46\u81f3\u5c11\u4f1a\u6709\u54cd\u5e94\u3002\u81f3\u4e8e\u4e3a\u4ec0\u4e48\u5185\u5b58\u4f1a\u7528\u591a\u4e86\uff0c\u53ef\u4ee5\u770b\u770b\u6709\u6ca1\u6709\u5185\u5b58\u6cc4\u6f0f\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : nonoyang <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @zeni123 java 8,\u6211\u6362\u4e0b\u8bd5\u8bd5\u3002\u4e5f\u662f\u6000\u7591\u662f\u5185\u5b58\u7528\u591a\u4e86\uff0c\u4f46\u603b\u662f\u76f4\u63a5\u5361\u6b7b\uff0c\u6ca1\u529e\u6cd5\u83b7\u53d6\u5361\u6b7b\u65f6\u7684\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\u3002\u6211\u51c6\u5907\u5b9e\u5728\u4e0d\u884c\uff0c\u8fd0\u884c\u4e00\u6bb5\u65f6\u95f4\u540e\uff0c\u4e0d\u7b49\u5361\u6b7b\uff0c\u63d0\u524d dump \u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Variazioni <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u6211\u5c31\u9047\u5230\u8fc7\u7c7b\u4f3c\u7684\u95ee\u9898\u3002\u3002\u6700\u540e\u7528 jProfiler \u67e5\u5230\u4e86\u539f\u56e0\u3002\u3002
    \u8bd5\u7528\u671f 10 \u5929\u3002\u3002\u5e94\u8be5\u591f\u7528\u4e86\u5427\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

    \u53ef\u590d\u73b0\u7684 Java \u8fdb\u7a0b\u5361\u6b7b\uff0c\u5982\u4f55…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/555494"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=555494"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/555494\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=555494"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=555494"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=555494"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}