Author: tderouin
Description:
We have recently moved to MW 1.4 (wiki.ehow.com), we have about 1.25 million
users imported from our site eHow. When we attempt to load the page
Special:Listadmins causes the site to become unresponsive. It appears that the
page gets stuck on this query:
188626 | idxuser | localhost | wikidb | Query | 354 | Sorting result | /* |
listadminspage::doQuery */ SELECT ur_rights as type,2 as namespace,user_name as
title, user_name |
And sorts the result for upwards of 10 minutes plus. Since it locks the user
table, access to our pages are blocked waiting for this call to complete.
We have very few admins on our site, maybe 10-15, so it looks like a problematic
SQL call or perhaps the code that migrated our database tables from the 1.3
version (user_rights in the user table) failed to create some necesary index for
the user_rights table.
If you have any questions, let me know.
Version: 1.4.x
Severity: normal
OS: Windows XP
Platform: PC