We are noticing a performance issue that we have traced back to our squid
configuration, but we are unsure how to fix it. The symptom is that every
time we save a wiki page, it takes about 7 seconds. Otherwise traversing
the wiki and rendering pages is not affected. We are running the following
software versions:
MediaWiki 1.25.2
PHP 5.5.30
MySQL 5.5.46
Squid 3.1.23
We followed the instructions at
https://www.mediawiki.org/wiki/Manual:Squid_caching#Configuring_MediaWiki.
In particular, we are using the following in LocalSettings.php:
$wgUseSquid = true;
$wgSquidServers = array('<your IPv4 address>');
$wgSquidServersNoPurge = array('127.0.0.1');
with our IP address inserted. When we comment out the $wgSquidServers line,
saving reverts to desired speedy performance, so we have concluded that the
problem involves purging the modified page. Supporting this conclusion, we
see the following in our debug log:
[squid] SquidPurgeClientPool: timeout (5s)
The wiki in question is only accessible by https. We do not see the same
problem on wikis that respond to http. Is there a configuration setting
that we need to accommodate this situation, or is that unrelated?
Thanks for any help in sorting this out.
Cindy