排查PHP-FPM占用CPU过高

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发现

如何发现的呢？当然是使用top命令，发现系统的load average>3，这说明系统已经处于比较高的负载中。

尝试解决

当我把php-fpm重启后，没过一会儿又开始cpu狂飙！这是什么鬼？

开始排查

首先，我们开启在php-fmp.conf中开启错误日志，慢执行日志还有常规日志

error_log = /var/log/php/error.log access.log = /var/log/php/access.$pool.log access.format = "%R - %u %t \"%m %r%Q%q\" %s %f %{mili}d %{kilo}M %{system}C%%" slowlog = /var/log/php/slow.$pool.log request_slowlog_timeout = 3s

重启php-fpm后我们开始监视日志

# 查看慢执行日志[15-May-2015 12:50:22] [pool www] pid 1819 script_filename = /home/ftp/phpergao/wwwroot/index.php [0x00007f2d286c2790] replace() /home/ftp/phpergao/wwwroot/usr/plugins/CdnHelper/Plugin.php:72 [0x00007fff78ab00f0] replace() unknown:0 [0x00007f2d286c2420] call_user_func_array() /home/ftp/phpergao/wwwroot/var/Typecho/Plugin.php:489 [0x00007fff78ab0430] __call() unknown:0 [0x00007f2d286c1f78] contentEx() /home/ftp/phpergao/wwwroot/var/Widget/Abstract/Contents.php:141 [0x00007f2d286c1b78] ___content() /home/ftp/phpergao/wwwroot/var/Typecho/Widget.php:385 [0x00007fff78ab0850] __get() unknown:0 [0x00007f2d286c1870] content() /home/ftp/phpergao/wwwroot/var/Widget/Abstract/Contents.php:783 [0x00007f2d286c1628] content() /home/ftp/phpergao/wwwroot/var/Widget/Archive.php:1401 [0x00007f2d286c14d0] content() /home/ftp/phpergao/wwwroot/usr/themes/just/index.php:32 [0x00007f2d286c10f8] +++ dump failed[15-May-2015 19:18:48] [pool www] pid 5597 script_filename = /home/ftp/phpergao/wwwroot/index.php [0x00007ff17fcf0168] __call() /home/ftp/phpergao/wwwroot/var/Typecho/Plugin.php:483 [0x00007fff915493c0] __call() unknown:0 [0x00007ff17fcefca8] ___title() /home/ftp/phpergao/wwwroot/var/Typecho/Widget.php:387 [0x00007fff915497e0] __get() unknown:0 [0x00007ff17fcef960] title() /home/ftp/phpergao/wwwroot/var/Widget/Abstract/Contents.php:809 [0x00007ff17fcef6d0] title() /home/ftp/phpergao/wwwroot/usr/themes/just/index.php:23 [0x00007ff17fcef2f8] +++ dump failed

其中contentEx引起了我的注意，这个方法是一个钩子，系统在获取到文章内容后执行，老高的有几个插件都挂载在此，突然就有想法了。

于是立即暂停有关的插件，过一阵负载变为load average: 0.39, 0.29, 0.42。

记录程序运行细节

记录程序运行时间

<?php $start = microtime(true);//index.php$end = microtime(true); $time = number_format(($end - $start), 2);echo 'This page loaded in ', $time, ' seconds'; ?>