How to enable slow log configuration in php-fpm?

This article introduces to you how to enable the slow log configuration in php-fpm? It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

Although nginx accesslog can record the time spent by users accessing a certain interface or web page, it cannot clearly track which location or function is slow, so through php-fpm slow log, slowlog settings can allow We can easily see which php processes are too slow and cause website problems

There is a parameter request_slowlog_timeout in the configuration file of php-fpm.conf which is described like this

; The timeout for serving a single request after which a PHP backtrace will be
; dumped to the 'slowlog' file. A value of '0s' means 'off'.
; Available units: s(econds)(default), m(inutes), h(ours), or d(ays)
; Default Value: 0; request_slowlog_timeout = 0

When request_slowlog_timeout is set to a specific second, request_slowlog_timeout =1 means that if any script execution time is greater than 1 second, the script will be recorded in the slow log file

request_slowlog_timeout =0 means closed Slow log output.

The slow log file location is in the log folder under the PHP installation directory by default, and can be specified by modifying the slowlog = log/$pool.log.slow parameter.

; The log file for slow requests
; Default Value: not set
; Note: slowlog is mandatory if request_slowlog_timeout is set
; slowlog = log/$pool.log.slow

Example of php-fpm slow log, the slow log will record the process number, script name, specific file and line of code, which function execution time has expired long.

[27-May-2016 13:20:37] NOTICE: child 16683 stopped for tracing
[27-May-2016 13:20:37] NOTICE: about to trace 16683[27-May-2016 13:20:37] NOTICE: finished trace of 16683[27-May-2016 13:20:37] WARNING: [pool www] child 16720, script '/Data/webapps/test/public/index.php' (request: "POST /index.php/test/test/") executing too slow (1.204894 sec), logging

request_slowlog_timeout and slowlog need to be set at the same time. When request_slowlog_timeout is turned on, slowlog needs to be turned on at the same time. The slow log path needs to be created manually.

Specifically enable php- fpm slow log steps:

cd /apps/phpvi /apps/php/etc/php-fpm.conf
去掉request_slowlog_timeout 、slowlog的前缀分号';'，设置request_slowlog_timeout =1；
:wq
保存退出
创建慢日志目录mkdir -p /apps/php/etc/log
重启php-fpmkillall php-fpm/apps/php/sbin/php-fpm

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