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

更多关于PHP相关内容感兴趣的读者可查看本站专题：《php程序设计安全教程》、《php面向对象程序设计入门教程》、《PHP数学运算技巧总结》、《PHP数组(Array)操作技巧大全》、《php字符串(string)用法总结》、《PHP数据结构与算法教程》、《php程序设计算法总结》及《php常见数据库操作技巧汇总》

希望本文所述对大家PHP程序设计有所帮助。