Manual:$wgMessageCacheType

Details
Message cache setting.

Here are the available CACHE constants, as defined in Defines.php


 * CACHE_ANYTHING - Use anything, as long as it works
 * CACHE_NONE - Do not cache
 * CACHE_DB - Store cache objects in the DB
 * CACHE_MEMCACHED - MemCached, must specify servers in $wgMemCachedServers
 * CACHE_ACCEL - eAccelerator, mmTurck or APC, whichever is available