[xwiki-users] XWiki using 100%CPU

Hi all, A couple pages on my wiki have been spammed and I was wondering if there is a way to delete all comments by XWikiGuest easily. I have noticed a table in the db called xwikircs that gets updated evertime there is a change to the wiki. Also noticed that when someone makes a comment some info about the comment, including the comments goes there too. But for some reason the xwikicomments table is empty? So i guess there are really two questions, why is the xwikicomments table empty and is there an easy way to delete spam comments (comments by XWikiGuest). Thanks in advanced! -m