{"id":13479,"date":"2024-07-11T16:56:10","date_gmt":"2024-07-11T08:56:10","guid":{"rendered":"https:\/\/www.simcentric.com\/uncategorized-sc\/solving-linux-cpu-100-issue-with-one-shell-script\/"},"modified":"2024-07-11T17:01:14","modified_gmt":"2024-07-11T09:01:14","slug":"solving-linux-cpu-100-issue-with-one-shell-script","status":"publish","type":"post","link":"https:\/\/www.simcentric.com\/sc\/hong-kong-dedicated-server-sc\/solving-linux-cpu-100-issue-with-one-shell-script\/","title":{"rendered":"Linux CPU 100% \u95ee\u9898\uff1a\u4e00\u4e2a Shell \u811a\u672c\u89e3\u51b3"},"content":{"rendered":"

[vc_row el_class=”blog-detail-section”][vc_column][vc_column_text]<\/p>\n

\u4f5c\u4e3a\u4e00\u4e2a\u9999\u6e2f\u670d\u52a1\u5668<\/a><\/strong>\u7528\u6237\uff0c\u4f60\u53ef\u80fd\u4f1a\u9047\u5230\u4e00\u4e9b CPU \u65b9\u9762\u7684\u95ee\u9898\u3002\u5f53\u6211\u4eec\u7684\u6570\u636e\u5e73\u53f0\u670d\u52a1\u5668\u7684CPU<\/a><\/strong>\u5229\u7528\u7387\u8fbe\u5230\u60ca\u4eba\u7684 98.94%\uff0c\u5e76\u957f\u65f6\u95f4\u4fdd\u6301\u5728 70% \u4ee5\u4e0a\u65f6\uff0c\u770b\u8d77\u6765\u50cf\u662f\u9700\u8981\u6269\u5bb9\u7684\u786c\u4ef6\u8d44\u6e90\u74f6\u9888\u3002\u7136\u800c\uff0c\u4ed4\u7ec6\u8003\u8651\u540e\uff0c\u6211\u4eec\u7684\u4e1a\u52a1\u7cfb\u7edf\u5e76\u4e0d\u662f\u9ad8\u5e76\u53d1\u6216 CPU \u5bc6\u96c6\u578b\u5e94\u7528\u3002\u5229\u7528\u7387\u8fc7\u4e8e\u6781\u7aef\uff0c\u4e0d\u5e94\u8be5\u8fd9\u4e48\u5feb\u5c31\u8fbe\u5230\u786c\u4ef6\u74f6\u9888\u3002\u4e1a\u52a1\u4ee3\u7801\u903b\u8f91\u7684\u67d0\u4e2a\u5730\u65b9\u4e00\u5b9a\u5b58\u5728\u95ee\u9898\u3002<\/p>\n

[\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text]<\/p>\n

\u6545\u969c\u6392\u67e5\u6b65\u9aa4<\/strong><\/h2>\n

2.1 \u786e\u5b9a\u9ad8\u8d1f\u8f7d\u8fdb\u7a0b\u7684 PID<\/strong><\/p>\n

\u9996\u5148\uff0c\u767b\u5f55\u670d\u52a1\u5668\uff0c\u4f7f\u7528 top<\/code> \u547d\u4ee4\u786e\u8ba4\u670d\u52a1\u5668\u7684\u5177\u4f53\u60c5\u51b5\uff0c\u7136\u540e\u6839\u636e\u60c5\u51b5\u8fdb\u884c\u5206\u6790\u5224\u65ad\u3002<\/p>\n

\u901a\u8fc7\u89c2\u5bdf load average \u548c\u8d1f\u8f7d\u8bc4\u4f30\u6807\u51c6\uff088\u6838\uff09\uff0c\u53ef\u4ee5\u786e\u8ba4\u670d\u52a1\u5668\u5b58\u5728\u9ad8\u8d1f\u8f7d\u60c5\u51b5\u3002\u89c2\u5bdf\u5404\u8fdb\u7a0b\u7684\u8d44\u6e90\u4f7f\u7528\u60c5\u51b5\uff0c\u53ef\u4ee5\u770b\u5230 ID \u4e3a 682 \u7684\u8fdb\u7a0b CPU \u767e\u5206\u6bd4\u76f8\u5bf9\u8f83\u9ad8\u3002<\/p>\n

2.2 \u786e\u5b9a\u5177\u4f53\u5f02\u5e38\u4e1a\u52a1<\/strong><\/p>\n

\u8fd9\u91cc\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 pwdx<\/code> \u547d\u4ee4\u6839\u636e PID \u627e\u5230\u4e1a\u52a1\u8fdb\u7a0b\u8def\u5f84\uff0c\u8fdb\u800c\u5b9a\u4f4d\u8d23\u4efb\u4eba\u548c\u9879\u76ee\uff1a<\/p>\n

\u53ef\u4ee5\u5f97\u51fa\uff0c\u8be5\u8fdb\u7a0b\u5bf9\u5e94\u6570\u636e\u5e73\u53f0\u7684 web \u670d\u52a1\u3002<\/p>\n

2.3 \u5b9a\u4f4d\u5f02\u5e38\u7ebf\u7a0b\u548c\u5177\u4f53\u4ee3\u7801\u884c<\/strong><\/p>\n

\u4f20\u7edf\u89e3\u51b3\u65b9\u6848\u901a\u5e38\u6d89\u53ca 4 \u4e2a\u6b65\u9aa4\uff1a<\/p>\n

1. top \u6309 P \u6392\u5e8f\uff1a1040 \/\/ \u9996\u5148\u6309\u8fdb\u7a0b\u8d1f\u8f7d\u6392\u5e8f\uff0c\u627e\u5230 maxLoad(pid)\r\n2. top -Hp \u8fdb\u7a0bPID\uff1a1073 \/\/ \u627e\u5230\u76f8\u5173\u8d1f\u8f7d\u7ebf\u7a0b PID\r\n3. printf \"0x%x\" \u7ebf\u7a0bPID\uff1a0x431 \/\/ \u5c06\u7ebf\u7a0b PID \u8f6c\u4e3a\u5341\u516d\u8fdb\u5236\uff0c\u4fbf\u4e8e\u540e\u7eed jstack \u65e5\u5fd7\u641c\u7d22\r\n4. jstack \u8fdb\u7a0bPID | vim +\/\u5341\u516d\u8fdb\u5236\u7ebf\u7a0bPID - \/\/ \u5982\uff1ajstack 1040|vim +\/0x431 -\r\n<\/code><\/pre>\n
\u4f46\u5bf9\u4e8e\u7ebf\u4e0a\u95ee\u9898\u5b9a\u4f4d\uff0c\u6bcf\u4e00\u79d2\u90fd\u5f88\u5b9d\u8d35\uff0c\u4e0a\u8ff0 4 \u4e2a\u6b65\u9aa4\u8fc7\u4e8e\u7e41\u7410\u8017\u65f6\u3002\u4e4b\u524d\u6dd8\u5b9d\u7684 oldratlee \u5c06\u4e0a\u8ff0\u8fc7\u7a0b\u5c01\u88c5\u6210\u4e00\u4e2a\u5de5\u5177\uff1ashow-busy-java-threads.sh<\/code>\uff0c\u53ef\u4ee5\u65b9\u4fbf\u5730\u5728\u7ebf\u4e0a\u5b9a\u4f4d\u6b64\u7c7b\u95ee\u9898\uff1a<\/p>\n
\u53ef\u4ee5\u5f97\u51fa\uff0c\u7cfb\u7edf\u4e2d\u4e00\u4e2a\u65f6\u95f4\u5de5\u5177\u7c7b\u65b9\u6cd5\u7684\u6267\u884c CPU \u767e\u5206\u6bd4\u5f88\u9ad8\u3002\u5b9a\u4f4d\u5230\u5177\u4f53\u65b9\u6cd5\u540e\uff0c\u68c0\u67e5\u4ee3\u7801\u903b\u8f91\u662f\u5426\u5b58\u5728\u6027\u80fd\u95ee\u9898\u3002[\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text]<\/p>\n
\u6839\u56e0\u5206\u6790<\/strong><\/h2>\n
\u7ecf\u8fc7\u524d\u9762\u7684\u5206\u6790\u6392\u67e5\uff0c\u6700\u7ec8\u786e\u5b9a\u4e86\u4e00\u4e2a\u65f6\u95f4\u5de5\u5177\u7c7b\u7684\u95ee\u9898\uff0c\u5bfc\u81f4\u670d\u52a1\u5668\u8d1f\u8f7d\u548c CPU \u4f7f\u7528\u7387\u9ad8\u3002<\/p>\n