Squid

Squid is a high-performance proxy server that can also be used as a HTTP accelerator for the webserver. (WMF has switched to using Varnish for HTTP-layer caching in preference to Squid but the term remains.)

参见：

• Manual:Squid caching/Simple config
• Manual:性能调优
• 手册:Varnish 缓存

and associated configuration variables (which were renamed to use more generic terms in 1.35):

• $wgUseSquid
• $wgSquidServers
• $wgSquidServersNoPurge

and hook:

• Manual:Hooks/TitleSquidURLs