QUOTE (piotrus @ Nov 16 2009, 10:47 PM)
Also, somebody with an access to database should check
this out.
MediaWiki comes preconfigured with a cap on memory usage. Lots of plugins (or certain plugins, such as the Semantic Wiki plugins) consume more than this. It probably just so happens that the wiki hits the cap when loading the UserMerge files.
Adding a line like the following to LocalSettings.php should help:
CODE
ini_set( 'memory_limit', '50M' );
Also, while the user merge plugin is useful, I'm not sure it needs to be loaded constantly. It
doesn't look like much else is loaded.