On 02/09/12 00:37, Dave Humphrey wrote:
> - An issue with the MediaWiki localization db cache when used with a high
> traffic site.

The DB store for the localisation cache is not really intended for
high-traffic sites, it's intended to make small wikis work out of the
box without extra configuration. For a high traffic site you should
set $wgCacheDirectory to a writable directory, or better still, set
$wgLocalisationCacheConf['manualRecache'] to true and run
maintenance/rebuildLocalisationCache.php each time the code is updated.

To solve the general problem of cache stampedes, you may want to
install the PoolCounter extension:

https://www.mediawiki.org/wiki/Extension:PoolCounter

-- Tim Starling


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