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