Slow log configuration is enabled in Nginx php-fpm (for detecting slow PHP scripts) _nginx

A lot of stationmaster turns to NGINX+PHP-FPM after, suffer 500,502 problem to be troubled. When Nginx received the error code, you can determine that the backend php-fpm parsing PHP has some kind of problem, such as execution error, execution timeout.

Php-fpm.conf's configuration file has a parameter request_slowlog_timeout is described in this way

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; The timeout for serving a only after which a PHP backtrace would 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 = 5, which indicates if which script executes longer than 5 seconds, this script is logged to the slow log file

Request_slowlog_timeout =0 indicates that slow log output is turned off.

Slow log file location default in the log folder in the installation directory of PHP, you can specify by modifying Slowlog = log/$pool. Log.slow parameters.

PHP-FPM Slow Log example, slow log will record the process number, script name, the specific file which line of code which function of the execution time is too long.

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[21-nov-2013 14:30:38] [Pool www] pid 11877
Script_filename =/usr/local/lnmp/nginx/html/www.quancha.cn/www/fyzb.php
[0xb70fb88c] file_get_contents ()/usr/local/lnmp/nginx/html/www.quancha.cn/www/fyzb.php:2

[21-nov-2013 14:15:23] ERROR: [Pool www] ' slowlog ' must be specified for use with ' request_slowlog_timeout '

Request_slowlog_timeout and Slowlog need to be set at the same time, open the request_slowlog_timeout and need to open the Slowlog

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[21-nov-2013 14:16:27] Error:unable to create or open Slowlog (/usr/local/lnmp/php/log/www.log.slow): No such file or directory (2)

Slow log paths need to be created manually

Specifically open PHP-FPM slow log steps:

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cd/usr/local/lnmp/php

VI etc/php-fpm.conf
Remove request_slowlog_timeout, slowlog prefix semicolon '; ', set request_slowlog_timeout = 5;

: Wq
Save exit

Create a slow log directory
mkdir Log

Restart PHP-FPM
Kill-int ' Cat Var/run/php-fpm.pid
sbin/php-fpm