Catalogs running slow after SP2 update

Hello,

I installed SP2 on my SBS2011 server just recently. I'm also backing up a W2012 server through agent backup. Didn't have any problems with SBS2011 before update. Catalogs were completing fine. Now I noticed, the backup itself, for both servers, complete succesfully but the catalogs keep running much longer then they are supposed to run. I never had this before. They run from 2 mins before update to >6 hours after update. I don't think this is 'normal' behavior. I guess SP2 still has some issues to be solved.

btw backups run on a NAS.