50例PHP杀死了我的web服务器？

Question

我之前有个“记忆不足”的问题。我刚刚离开顶部打开，它冻结在屏幕上，因为它的内存耗尽。我有一个用户列出了大约50个实例的"php“列出。如何限制允许打开PHP实例的数量？还是允许单个用户使用的PHP实例数？为什么它使用这么多PHP实例？这是wordpress的网站。

Answer 1

基本上，默认的php配置是使用比可用RAM更多的RAM。您需要配置PHP，这样它就不会像这一个这样的指南那样耗尽资源。

sudo nano /etc/php/7.0/fpm/pool.d/www.conf

您需要决定要使用的PM类型。读这个。按需应变通常适用于低内存服务器，因为这些服务器的流量很少。我认为我对我的主PHP池使用了dynamic，因为它使一些PHP进程始终可用，等待服务请求，然后按需测试很少使用的PHP池。ondemand意味着需要启动更多的php进程延迟，但是对于较低的卷站点，这可能是可以的。

如果您的内存少，流量少，那么配置可能是这样的。

pm = ondemand

; 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 = 60s;

; 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 = 50

如果您获得更高的流量，您可能会更好地使用动态和调优的值，以便您有足够的服务器运行在CPU / RAM中，您有可用的。

PHP5.6

在我的AWSt2上，我有两个池。下面是为生产请求提供服务的动态池的定义

文件:/etc/php 5.6.d/www.conf

pm = dynamic
pm.start_servers = 2
pm.max_children = 4
pm.start_servers = 2
pm.max_spare_servers = 2
pm.min_spare_servers = 1
pm.max_requests = 25

下面是我的测试池，用于我很少访问的测试服务器

/etc/php-fpm-5.6.d/testpool.conf文件：

文件pm = ondemand pm.max_children = 2 pm.process_idle_timeout = 120s; pm.max_requests = 50