{"id":1061,"date":"2014-10-25T20:14:54","date_gmt":"2014-10-25T12:14:54","guid":{"rendered":"http:\/\/coderbee.net\/?p=1061"},"modified":"2014-11-27T22:36:49","modified_gmt":"2014-11-27T14:36:49","slug":"jvm-cpu-%e4%bd%bf%e7%94%a8%e7%8e%87%e9%ab%98-%e9%97%ae%e9%a2%98%e4%b8%a4%e5%88%99","status":"publish","type":"post","link":"https:\/\/coderbee.net\/index.php\/jvm\/20141025\/1061","title":{"rendered":"JVM CPU \u4f7f\u7528\u7387\u9ad8 \u95ee\u9898\u4e24\u5219"},"content":{"rendered":"

\u6700\u8fd1\u6709\u4e24\u4e2a\u7cfb\u7edf\u5148\u540e\u88ab\u6076\u610f\u626b\u63cf\uff0c\u51fa\u73b0 CPU \u4f7f\u7528\u7387\u9ad8\u7684\u73b0\u8c61\u3002\u5f88\u597d\uff0c\u628a\u95ee\u9898\u66b4\u9732\u51fa\u6765\u89e3\u51b3\u6389\u3002<\/p>\n

CPU \u4f7f\u7528\u7387\u5f88\u9ad8\uff0c\u9996\u5148\u662f\u8981\u627e\u51fa CPU \u5728\u6267\u884c\u4ec0\u4e48\u6837\u7684\u4ee3\u7801\uff0c\u7136\u540e\u5728\u5206\u6790\u8fd9\u4e9b\u4ee3\u7801\u6709\u4ec0\u4e48\u95ee\u9898\u3002<\/p>\n

\u4e00\u3001\u95ee\u9898\u5b9a\u4f4d<\/h3>\n

1\u3001 \u7528\u547d\u4ee4 \u201cps aux | grep APP\u201d \u627e\u51fa\u5e94\u7528\u7684\u8fdb\u7a0b id\uff1a<\/p>\n

801       84703  5.6 28.8 4627436 1132100 pts\/2 Sl   11:08  11:19 \/usr\/jdk1.6.0_38\/bin\/java APP\n<\/code><\/pre>\n
2\u3001  \u627e\u51fa\u8017CPU\u7684\u7ebf\u7a0b\uff0c\u5728Linux\u7cfb\u7edf\u4e0b\u7528\u547d\u4ee4\uff1a\u201c top  \u2013H  \u2013p  pid  \u201d<\/code>\uff0c pid \u5c31\u662f\u524d\u9762\u627e\u51fa\u6765\u7684\u5e94\u7528\u8fdb\u7a0b ID \u3002\u8fd9\u4e2a\u547d\u4ee4\u4f1a\u663e\u793a\u51fa\u5f53\u524d\u5360\u7528CPU\u9ad8\u7684\u7ebf\u7a0b\u3002<\/p>\n
Tasks: 426 total,   0 running, 426 sleeping,   0 stopped,   0 zombie\nCpu(s):  0.5%us,  0.6%sy,  0.0%ni, 72.3%id, 26.6%wa,  0.0%hi,  0.0%si,  0.0%st\nMem:   3924912k total,  3308088k used,   616824k free,      768k buffers\nSwap:  8388600k total,  3236720k used,  5151880k free,    12304k cached\n\n   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND\n84784 appdeplo  20   0 4518m 1.1g 3816 S  0.4 29.0   0:00.85 java\n84903 appdeplo  20   0 4518m 1.1g 3816 S  0.4 29.0   0:34.66 java\n84983 appdeplo  20   0 4518m 1.1g 3816 S  0.4 29.0   0:00.99 java\n85091 appdeplo  20   0 4518m 1.1g 3816 S  0.4 29.0   0:02.69 java\n85164 appdeplo  20   0 4518m 1.1g 3816 S  0.4 29.0   0:04.92 java\n84703 appdeplo  20   0 4518m 1.1g 3816 S  0.0 29.0   0:00.00 java\n84704 appdeplo  20   0 4518m 1.1g 3816 S  0.0 29.0   0:00.42 java\n84705 appdeplo  20   0 4518m 1.1g 3816 S  0.0 29.0   0:02.52 java\n84706 appdeplo  20   0 4518m 1.1g 3816 S  0.0 29.0   0:02.64 java\n84707 appdeplo  20   0 4518m 1.1g 3816 S  0.0 29.0   0:02.46 java\n84708 appdeplo  20   0 4518m 1.1g 3816 S  0.0 29.0   0:02.39 java\n84709 appdeplo  20   0 4518m 1.1g 3816 S  0.0 29.0   0:33.99 java\n<\/code><\/pre>\n
\u8fd9\u91cc\u7684 PID \u6bd4\u5982 84784<\/code> \u662f\u5341\u8fdb\u5236\u7684\uff0c\u9700\u8981\u8f6c\u6362\u4e3a\u5341\u516d\u8fdb\u5236\uff0c\u7528windows\u7684\u8ba1\u7b97\u5668\u5c31\u53ef\u4ee5\u8f6c\u6362\u4e86\uff0c\u8f6c\u6362\u4e3a\u5341\u516d\u8fdb\u5236\u662f\uff1a14B30<\/code>\u3002<\/p>\n
<\/p>\n
3\u3001  dump \u51fa\u8fdb\u7a0b\u7684\u6240\u6709\u7ebf\u7a0b\u6808\uff0c\u7528\u547d\u4ee4 \u201c.\/jstack -F -m -l 84703 > 84703.stack\u201d<\/code>\uff0c 84703<\/code> \u662f pid\u3002
\ndump\u51fa\u7684\u5176\u4e2d\u4e00\u4e2a\u7ebf\u7a0b\u6808\u5927\u6982\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n
\"container-332\" prio=10 tid=0x00007f4a044fa800 nid=0x13c7a runnable [0x00007f46e4ec8000]\n   java.lang.Thread.State: RUNNABLE\n         at java.net.SocketInputStream.socketRead0(Native Method)\n         at java.net.SocketInputStream.read(SocketInputStream.java:129)\n         at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)\n         at java.io.BufferedInputStream.read(BufferedInputStream.java:237)\n         - locked <0x0000000709252728> (a java.io.BufferedInputStream)\n         at java.io.DataInputStream.readInt(DataInputStream.java:370)\n         at com.ibm.mq.MQInternalCommunications.timedReadInt(MQInternalCommunications.java:2748)\n         at com.ibm.mq.MQInternalCommunications.receiveBytesFaster(MQInternalCommunications.java:2846)\n         - locked <0x00000007092524e0> (a com.ibm.mq.MQv6InternalCommunications)\n         at com.ibm.mq.MQInternalCommunications.receive(MQInternalCommunications.java:1179)\n         - locked <0x00000007092524e0> (a com.ibm.mq.MQv6InternalCommunications)\n         at com.ibm.mq.MQSESSIONClient.lowLevelComms(MQSESSIONClient.java:2841)\n         - locked <0x0000000709252e10> (a java.lang.Integer)\n         at com.ibm.mq.MQSESSIONClient.MQGET(MQSESSIONClient.java:1852)\n         at com.ibm.mq.MQQueue.getMsg2Int(MQQueue.java:1217)\n         - locked <0x0000000760c4c738> (a com.ibm.mq.MQSPIQueue)\n         at com.ibm.mq.MQQueue.getMsg2(MQQueue.java:1074)\n         - locked <0x0000000760c4c738> (a com.ibm.mq.MQSPIQueue)\n         at com.ibm.mq.jms.MQMessageConsumer.getMessage(MQMessageConsumer.java:3451)\n         at com.ibm.mq.jms.MQMessageConsumer.receiveInternal(MQMessageConsumer.java:2866)\n         at com.ibm.mq.jms.MQMessageConsumer.receive(MQMessageConsumer.java:2669)\n         at com.ibm.mq.connector.outbound.MessageConsumerWrapper.receive(MessageConsumerWrapper.java:180)\n         at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveMessage(AbstractPollingMessageListenerContainer.java:429)\n         at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute(AbstractPollingMessageListenerContainer.java:310)\n         at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute(AbstractPollingMessageListenerContainer.java:263)\n         at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.invokeListener(DefaultMessageListenerContainer.java:1058)\n         at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.executeOngoingLoop(DefaultMessageListenerContainer.java:1050)\n         at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:947)\n         at java.lang.Thread.run(Thread.java:662)\n<\/code><\/pre>\n
\u7b2c\u4e00\u884c\u7684 nid \u5c31\u662f\u524d\u9762\u8f6c\u6362\u51fa\u6765\u7684\u5341\u516d\u8fdb\u5236\u6570\u5b57\uff0c\u6240\u6709\u7ebf\u7a0b\u90fd\u6709\u8fd9\u6837\u7684\u5bf9\u5e94\u7ebf\u7a0b\u6808\u3002\u7ebf\u7a0bdump\u6587\u4ef6\u662f\u6587\u672c\u6587\u4ef6\uff0c\u76f4\u63a5\u7528\u6587\u672c\u7f16\u8f91\u5668\u67e5\u770b\u5c31\u53ef\u4ee5\u4e86\u3002\u4ece\u4e0a\u9762\u7684\u7ebf\u7a0b\u6808\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u770b\u5230\u5360\u7528cpu\u9ad8\u7684\u7ebf\u7a0b\u5728\u505a\u4ec0\u4e48\u3002<\/p>\n
\u4e8c\u3001\u95ee\u9898\u5206\u6790<\/h3>\n
\u8fd9\u4e24\u4e2a\u95ee\u9898\u867d\u7136\u539f\u56e0\u4e0d\u540c\uff0c\u4f46\u90fd\u53ef\u4ee5\u901a\u8fc7\u4e0a\u9762\u7684\u65b9\u6cd5\u627e\u5230\u95ee\u9898\u4ee3\u7801\u3002<\/p>\n
\u590d\u6742\u6b63\u5219\u5bfc\u81f4 CPU \u4f7f\u7528\u7387\u9ad8<\/h4>\n
\u4ece\u5f53\u65f6 dump \u51fa\u6765\u7684\u7ebf\u7a0b\u6808\u6765\u770b\uff0cCPU \u4e00\u76f4\u5728\u6267\u884c\u6b63\u5219\u5339\u914d\u3002<\/p>\n
\u4ee5\u524d\u4e00\u76f4\u4ee5\u4e3a\u6b63\u5219\u5339\u914d\u662f\u5f88\u9ad8\u6548\u7684\uff0c\u5176\u5b9e\u4e0d\u662f\u3002Java \u7684\u6b63\u5219\u5339\u914d\u91c7\u7528\u7684\u8d2a\u5a6a\u6a21\u5f0f\uff0c\u4e5f\u5c31\u662f\u5bf9\u6bcf\u4e2a\u6a21\u5f0f\uff0c\u91c7\u7528\u5c3d\u53ef\u80fd\u5339\u914d\u6700\u591a\u4e2a\u5b57\u7b26\uff0c\u5f53\u5339\u914d\u4e0d\u6210\u529f\u65f6\uff0c\u518d\u56de\u9000\uff0c\u8fd9\u6837\u53ef\u80fd\u5bfc\u81f4\u5339\u914d\u7684\u590d\u6742\u5ea6\u8ddf\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u6210\u9636\u4e58\u7684\u5173\u7cfb\uff0c\u53ef\u4ee5\u770b\u770b\u8fd9\u7bc7\u6587\u7ae0\u7684\u5206\u6790<\/a>\u3002<\/p>\n
\u968f\u4fbf\u5199\u4e86\u4e2a\u4e0a\u767e\u4e2a\u5b57\u7b26\u7684\u5b57\u7b26\u4e32\u53bb\u6d4b\u8bd5\u6211\u4eec\u7684\u6b63\u5219\uff0c\u53d1\u73b0\u51e0\u4e2a\u949f\u90fd\u6ca1\u5339\u914d\u5b8c\uff0c\u6c57\uff01<\/p>\n
HashMap \u5728\u5e76\u53d1\u8bbf\u95ee\u4e0b\u5bfc\u81f4 CPU \u4f7f\u7528\u7387\u9ad8<\/h4>\n
HashMap \u662f\u975e\u7ebf\u7a0b\u5b89\u5168\u7684\uff0c\u5728\u5e76\u53d1\u8bbf\u95ee\u7684\u60c5\u51b5\u4e0b\u5c31\u53ef\u80fd\u51fa\u73b0\u6b7b\u5faa\u73af\uff0c\u8fd9\u4e2a\u6b7b\u5faa\u73af\u7684\u5206\u6790\u7f51\u4e0a\u5f88\u591a\u4e86\u3002Spring \u7684\u7f13\u5b58\u6a21\u5757\uff08spring-modules-cache-0.7.jar\uff09\u7528\u5b83\u4f5c\u4e3a\u7f13\u5b58\uff0c\u5728\u5e73\u65f6\u5e76\u53d1\u8bbf\u95ee\u5ea6\u4e0d\u9ad8\uff0c\u6ca1\u6709\u95ee\u9898\uff0c\u88ab\u6076\u610f\u626b\u63cf\u65f6\uff0c\u5c31\u89e6\u53d1\u4e86\u6b7b\u5faa\u73af\uff0c\u53ef\u4ee5\u770b\u8fd9\u4e2abug \u62a5\u544a https:\/\/jira.spring.io\/browse\/MOD-371<\/a>\u3002<\/p>\n\n
\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u5fae\u4fe1\u516c\u4f17\u53f7: coderbee\u7b14\u8bb0<\/strong>\uff0c\u53ef\u4ee5\u66f4\u53ca\u65f6\u56de\u590d\u4f60\u7684\u8ba8\u8bba\u3002<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6700\u8fd1\u6709\u4e24\u4e2a\u7cfb\u7edf\u5148\u540e\u88ab\u6076\u610f\u626b\u63cf\uff0c\u51fa\u73b0 CPU \u4f7f\u7528\u7387\u9ad8\u7684\u73b0\u8c61\u3002\u5f88\u597d\uff0c\u628a\u95ee\u9898\u66b4\u9732\u51fa\u6765 … \u7ee7\u7eed\u9605\u8bfb →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[96],"tags":[200,233],"_links":{"self":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/1061"}],"collection":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/comments?post=1061"}],"version-history":[{"count":3,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/1061\/revisions"}],"predecessor-version":[{"id":1065,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/1061\/revisions\/1065"}],"wp:attachment":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/media?parent=1061"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/categories?post=1061"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/tags?post=1061"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}