$wgMemCachedTimeout = 500000;
/**
- * Set this to true to make a local copy of the message cache, for use in
- * addition to memcached. The files will be put in $wgCacheDirectory.
+ * Set this to true to maintain a copy of the message cache on the local server.
+ *
+ * This layer of message cache is in addition to the one configured by $wgMessageCacheType.
+ *
+ * The local copy is put in APC. If APC is not installed, this setting does nothing.
+ *
+ * Note that this is about the message cache, which stores interface messages
+ * maintained as wiki pages. This is separate from the localisation cache for interface
+ * messages provided by the software, which is configured by $wgLocalisationCacheConf.
*/
$wgUseLocalMessageCache = false;