Last modified: 2010-05-15 15:42:49 UTC
Changes made to the MediaWiki namespace weren't available after updating MediaWiki to version 1.8.2 after runnung maintenance/update.php. The pages in MediaWiki namespace where still available with all their content, but neither Special:Allmessages nor the GUI showed the changes anymore. After investigating with several updated and a freshly installed wiki with Brion he found out, that the reason was in the objectcache table. We therefore agreed to include a purge cache function into maintenance/update.php to avoid this problem in future.
Created attachment 2764 [details] introduce the new function purge_objectcache() and run it by default after updates.
Created attachment 2765 [details] clean patch from an unmodified source file (function call was already included in old version)
right now I found out (on two different wikis on two different servers): If you don't clear the object cache after upgrading from 1.8.2 to 1.9alpha apache will start using up all CPU time. After clearing the cache it worked smoothly.
Fixed in r18531.
