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Linux CPU高占用,就按这6步排查

  • 2026-08-18 23:11:37
Linux CPU高占用,就按这6步排查

Linux CPU高占用，就按这6步排查

排查多就会发现CPU高只是一个现象，背后的原因可能完全不同。有时候是某个核心被打满，有时候是业务进程短时冲高，也可能是磁盘 I/O 慢，任务都堵在等待上。比较稳妥的做法是先看整体，再看每个核心，后面定位到具体进程和线程，最后结合一段时间的数据判断。
查 Linux CPU 问题，别只盯着一个百分比看。先确认整体是不是真的忙，再看单核、进程、线程和 I/O 等待。#CPU#网络工程师#网络工具#网络设备#网络安全#计算机专业#互联网#程序员#网络通信

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  1. 请求信息 : 2026-08-21 15:31:12 HTTP/2.0 GET : https://f.mffb.com.cn/a/508377.html
  2. 运行时间 : 0.311816s [ 吞吐率：3.21req/s ] 内存消耗：4,870.89kb 文件加载：140
  3. 缓存信息 : 0 reads,0 writes
  4. 会话信息 : SESSION_ID=e64e9662938a8ce7c9cbf8a899ef298b
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  1. CONNECT:[ UseTime:0.000999s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001404s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.004689s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000691s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001421s ]
  6. SELECT * FROM `set` [ RunTime:0.009241s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001552s ]
  8. SELECT * FROM `article` WHERE `id` = 508377 LIMIT 1 [ RunTime:0.005437s ]
  9. UPDATE `article` SET `lasttime` = 1787297473 WHERE `id` = 508377 [ RunTime:0.020286s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 67 LIMIT 1 [ RunTime:0.006450s ]
  11. SELECT * FROM `article` WHERE `id` < 508377 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.010420s ]
  12. SELECT * FROM `article` WHERE `id` > 508377 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.002207s ]
  13. SELECT * FROM `article` WHERE `id` < 508377 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.030205s ]
  14. SELECT * FROM `article` WHERE `id` < 508377 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002316s ]
  15. SELECT * FROM `article` WHERE `id` < 508377 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.036617s ]
0.317418s