Linux平台PHP5.4设置FPM线程数量的方法

本文实例讲述了linux平台php5.4设置fpm线程数量的方法。分享给大家供大家参考，具体如下：

php5.4安装完毕后，fpm的默认配置文件位于/usr/local/php/etc/php-fpm.conf.default

>cp /usr/local/php/etc/php-fpm.conf.default /usr/local/php/etc/php-fpm.conf
>vim /usr/local/php/etc/php-fpm.conf

输入”/www”，搜索www所在的pool

pm = dynamic
; the number of child processes to be created when pm is set to 'static' and the
; maximum number of child processes when pm is set to 'dynamic' or 'ondemand'.
; this value sets the limit on the number of simultaneous requests that will be
; served. equivalent to the apachemaxclients directive with mpm_prefork.
; equivalent to the php_fcgi_children environment variable in the original php
; cgi. the below defaults are based on a server without much resources. don't
; forget to tweak pm.* to fit your needs.
; note: used when pm is set to 'static', 'dynamic' or 'ondemand'
; note: this value is mandatory.
pm.max_children = 5
; the number of child processes created on startup.
; note: used only when pm is set to 'dynamic'
; default value: min_spare_servers + (max_spare_servers - min_spare_servers) / 2
pm.start_servers = 2
; the desired minimum number of idle server processes.
; note: used only when pm is set to 'dynamic'
; note: mandatory when pm is set to 'dynamic'
pm.min_spare_servers = 1
; the desired maximum number of idle server processes.
; note: used only when pm is set to 'dynamic'
; note: mandatory when pm is set to 'dynamic'
pm.max_spare_servers = 3
; the number of seconds after which an idle process will be killed.
; note: used only when pm is set to 'ondemand'
; default value: 10s
;pm.process_idle_timeout = 10s;
; the number of requests each child process should execute before respawning.
; this can be useful to work around memory leaks in 3rd party libraries. for
; endless request processing specify '0'. equivalent to php_fcgi_max_requests.
; default value: 0
;pm.max_requests = 500

解释一下：

pm = dynamic 如何控制子进程，选项有static和dynamic，默认采用dynamic；如果选择static，则由pm.max_children指定固定的子进程数。

如果选择dynamic，则由以下参数决定：

pm.max_children	子进程最大数
pm.start_servers	启动时的进程数
pm.min_spare_servers	保证空闲进程数最小值，如果空闲进程小于此值，则创建新的子进程
pm.max_spare_servers	保证空闲进程数最大值，如果空闲进程大于此值，则进行清理。对于专用服务器，pm可以设置为static。
pm.max_requests	设置每个子进程重生之前服务的请求数. 对于可能存在内存泄漏的第三方模块来说是非常有用的. 如果设置为 '0′ 则一直接受请求. 设置为500就可以了（默认0）。

将值修改为如下：

pm.max_children = 32
pm.start_servers = 16
pm.min_spare_servers = 8
pm.max_spare_servers = 32
pm.max_requests = 500

:wq 保存退出vim

>/usr/local/php/sbin/php-fpm -t
notice: configuration file /usr/local/php/etc/php-fpm.conf test is successful

测试配置文件是否正常，没问题，杀掉当前的fpm进程

>/usr/local/php/sbin/php-fpm

启动

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