Mercurial > hg > nginx-site
view xml/en/docs/events.xml @ 1199:5ee8a00f2bc5
Documented the uwsgi_modifier1 and uwsgi_modifier2 directives.
author | Yaroslav Zhuravlev <yar@nginx.com> |
---|---|
date | Tue, 20 May 2014 14:41:05 +0400 |
parents | 629630df119a |
children | eea7541e7c6a |
line wrap: on
line source
<!-- Copyright (C) Igor Sysoev Copyright (C) Nginx, Inc. --> <!DOCTYPE article SYSTEM "../../../dtd/article.dtd"> <article name="Connection processing methods" link="/en/docs/events.html" lang="en" rev="2"> <section> <para> nginx supports a variety of connection processing methods. The availability of a particular method depends on the platform used. On platforms that support several methods nginx will normally select the most efficient method automatically. However, if needed, a connection processing method can be selected explicitly with the <link doc="ngx_core_module.xml" id="use"/> directive. </para> <para> The following connection processing methods are supported: <list type="bullet"> <listitem id="select"> <para> <literal>select</literal>—standard method. The supporting module is built automatically on platforms that lack more efficient methods. The <literal>--with-select_module</literal> and <literal>--without-select_module</literal> configuration parameters can be used to forcibly enable or disable the build of this module. </para> </listitem> <listitem id="poll"> <para> <literal>poll</literal>—standard method. The supporting module is built automatically on platforms that lack more efficient methods. The <literal>--with-poll_module</literal> and <literal>--without-poll_module</literal> configuration parameters can be used to forcibly enable or disable the build of this module. </para> </listitem> <listitem id="kqueue"> <para> <literal>kqueue</literal>—efficient method used on FreeBSD 4.1+, OpenBSD 2.9+, NetBSD 2.0, and Mac OS X. </para> </listitem> <listitem id="epoll"> <para> <literal>epoll</literal>—efficient method used on Linux 2.6+. <note> Some older distributions like SuSEĀ 8.2 provide patches that add epoll support to 2.4 kernels. </note> </para> </listitem> <listitem id="rtsig"> <para> <literal>rtsig</literal>—real time signals, efficient method used on Linux 2.2.19+. By default, the system-wide event queue is limited by 1024 signals. On loaded servers it may become necessary to increase this limit by changing the <path>/proc/sys/kernel/rtsig-max</path> kernel parameter. However, in Linux 2.6.6-mm2 this parameter is gone, and each process now has its own event queue. The size of each queue is limited by <literal>RLIMIT_SIGPENDING</literal> and can be changed with <link doc="ngx_core_module.xml" id="worker_rlimit_sigpending"/>. </para> <para> On queue overflow, nginx discards the queue and falls back to <literal>poll</literal> connection processing method until the situation gets back to normal. </para> </listitem> <listitem id="devpoll"> <para> <literal>/dev/poll</literal>—efficient method used on Solaris 7 11/99+, HP/UX 11.22+ (eventport), IRIX 6.5.15+, and Tru64 UNIX 5.1A+. </para> </listitem> <listitem id="eventport"> <para> <literal>eventport</literal>—event ports, efficient method used on Solaris 10. </para> </listitem> </list> </para> </section> </article>