Linux平台PHP5.4設置FPM線程數量的方法

本文實例講述了Linux平台PHP5.4設置FPM線程數量的方法。分享給大家供大家參考，具體如下：

PHP5.4安裝完畢後，FPM的默認配置文件位於/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

輸入”/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

解釋一下：

pm = dynamic 如何控制子進程，選項有static和dynamic，默認采用dynamic；如果選擇static，則由pm.max_children指定固定的子進程數。

如果選擇dynamic，則由以下參數決定：

pm.max_children 子進程最大數 pm.start_servers 啟動時的進程數 pm.min_spare_servers 保證空閒進程數最小值，如果空閒進程小於此值，則創建新的子進程 pm.max_spare_servers 保證空閒進程數最大值，如果空閒進程大於此值，則進行清理。對於專用服務器，pm可以設置為static。 pm.max_requests 設置每個子進程重生之前服務的請求數. 對於可能存在內存洩漏的第三方模塊來說是非常有用的. 如果設置為 '0′ 則一直接受請求. 設置為500就可以了（默認0）。

將值修改為如下：

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

測試配置文件是否正常，沒問題，殺掉當前的FPM進程

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

啟動

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