运行维护：Centos系统批量查杀僵尸进程

运行环境 Runtime environment

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操作系统： Red Hat 4.8.5-16

背景

类似开启Win系统的任务管理器，输入top命令

top

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top - 16:10:53 up 25 days, 11 min,  2 users,  load average: 3.00, 3.21, 2.93
Tasks: 595 total,   2 running, 593 sleeping,   0 stopped,   22 zombie
%Cpu(s):  7.7 us,  1.6 sy,  0.0 ni, 90.7 id,  0.0 wa,  0.0 hi,  0.1 si,  0.0 st
KiB Mem : 65536176 total, 37648408 free, 22068912 used,  5818856 buff/cache
KiB Swap: 52428796 total, 52428796 free,        0 used. 42291636 avail Mem

....

22 zombie 代表当前存在22个僵尸进程

查询僵尸进程

以防万一，还是查看一下僵尸进程都有的详细信息。

因为状态为 z或者Z 的进程为僵尸进程，所以使用grep抓取stat状态为zZ进程

ps -A -o stat,ppid,pid,cmd | grep -e ‘^[Zz]’

查询结果:

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jump      19108 456925  0 15:16 pts/1    00:00:00 grep --color=auto chrome
jump     256360 245064  0 May12 ?        00:00:08 [chrome] <defunct>
jump     256360 245064  0 May12 ?        00:00:08 [chrome] <defunct>
jump     256360 245064  0 May12 ?        00:00:08 [chrome] <defunct>
jump     256581 245064  0 May12 ?        00:00:00 [chrome] <defunct>
jump     265115 245064  0 May12 ?        00:00:00 [chrome] <defunct>
jump     276491 245064  0 May12 ?        00:00:08 [chrome] <defunct>
jump     288434 245064  0 May12 ?        00:00:00 [chrome] <defunct>
jump     310725 238834  0 11:06 ?        00:00:00 [chrome] <defunct>
jump     311343 245064  0 May12 ?        00:00:08 [chrome] <defunct>
jump     317738 238834  0 11:08 ?        00:00:01 [chrome] <defunct>
jump     319714 238834  0 11:08 ?        00:00:01 [chrome] <defunct>
jump     335549 238834  0 11:12 ?        00:00:00 [chrome] <defunct>
jump     357632 355570  0 14:09 ?        00:00:01 [chrome] <defunct>
jump     396095 355570  0 14:15 ?        00:00:01 [chrome] <defunct>
jump     399044 355570  0 14:16 ?        00:00:00 [chrome] <defunct>
jump     403243 355570  0 14:16 ?        00:00:00 [chrome] <defunct>
jump     419426 238834  0 11:29 ?        00:00:00 [chrome] <defunct>
jump     442668 238834  0 11:35 ?        00:00:00 [chrome] <defunct>
jump     442746 355570  0 14:22 ?        00:00:00 [chrome] <defunct>
jump     448704 238834  0 11:40 ?        00:00:00 [chrome] <defunct>
jump     449129 355570  0 14:27 ?        00:00:00 [chrome] <defunct>
jump     452443 355570  0 14:40 ?        00:00:00 [chrome] <defunct>
jump     452476 355570  0 14:40 ?        00:00:00 [chrome] <defunct>

scrapty+gerapy-pyppeteer 爬虫采集导致大量的chrome浏览器残余进程。

批量杀死僵尸进程

获取所有僵尸进程的pid,然后批量处理

ps -A -o stat,ppid,pid,cmd | grep -e ‘^[Zz]’ | awk ‘{print $2}’ | xargs kill -9

总结

批量杀死进程真是好东西。