>> Yes, sorry, Wesley Craig's response pointed me in that direction and that >> definitely seems to be the problem. > > How many mailboxes are returned by these LIST operations? We run Horde > with Cyrus here, but we have no shared mailboxes and no problems with high > load on the Cyrus frontends. Well, none, in general. But it's a 200MB mailboxes.db so I assume scanning that (to return nothing) is what takes up the cpu time. John -- John Madden Sr UNIX Systems Engineer Ivy Tech Community College of Indiana jmadden@xxxxxxxxxxx ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html