Home Operation and Maintenance Nginx What is the meaning of events configuration in nginx

What is the meaning of events configuration in nginx

May 19, 2023 pm 08:40 PM
nginx events

worker_connections 1024;

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定义每个work_process同时开启的最大连接数,即允许最多只能有这么多连接。

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accept_mutex on;

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当某一个时刻只有一个网络连接请求服务器时,服务器上有多个睡眠的进程会被同时叫醒,这样会损耗一定的服务器性能。

Nginx中的accept_mutex设置为on,将会对多个Nginx进程(worker processer)接收连接时进行序列化,防止多个进程争抢资源。

默认就是on。

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multi_accept on;

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nginx worker processer可以做到同时接收多个新到达的网络连接,前提是把该参数设置为on。

默认为off,即每个worker process一次只能接收一个新到达的网络连接。

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use epoll;

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Nginx服务器提供了多个事件驱动器模型来处理网络消息。

其支持的类型有:select、poll、kqueue、epoll、rtsing、/dev/poll以及eventport。

* select:只能在Windows下使用,这个事件模型不建议在高负载的系统使用

* poll:Nginx默认首选,但不是在所有系统下都可用

* kqueue:这种方式在FreeBSD 4.1+, OpenBSD2.9+, NetBSD 2.0, 和 MacOS X系统中是最高效的

* epoll: 这种方式是在Linux 2.6+内核中最高效的方式

* rtsig:实时信号,可用在Linux 2.2.19的内核中,但不适用在高流量的系统中

* /dev/poll: Solaris 7 11/99+,HP/UX 11.22+, IRIX 6.5.15+, and Tru64 UNIX 5.1A+操作系统最高效的方式

* eventport: Solaris 10最高效的方式

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