Manual:$wgCacheSharedUploads

Shared uploads: $wgCacheSharedUploads
Cache shared metadata in memcached.
Introduced in version:	1.5.0
Removed in version:	Still in use
Allowed values:	(boolean)
Default value:	true
Other settings: Alphabetical | By function

Details

Cache shared metadata in memcached. Don't do this if the commons wiki is in a different memcached domain.

See also

• Manual:$wgForeignFileRepos - a more flexible way of configuring shared upload repositories (and the only way, if you want to set up more than one shared upload source)