Hello Sebastian, What I wanted to describe with "stalled" is, that none of the processes was doing anything. So the problem was not that 100 instances where working and connection #101 was waiting; it was that all 100 instances were also hanging. At the same time, the imaps-processes where working. That is what I had in my logs from imap: May 18 10:07:33 bilbo cyrus/imap[18436]: Connection reset by peer, closing connection May 18 10:07:33 bilbo cyrus/imap[17450]: Connection reset by peer, closing connection May 18 10:07:33 bilbo cyrus/imap[17916]: Connection reset by peer, closing connection May 18 10:07:33 bilbo cyrus/imap[17449]: Connection reset by peer, closing connection May 18 10:07:33 bilbo cyrus/imap[18775]: Connection reset by peer, closing connection May 18 10:07:33 bilbo cyrus/imap[18777]: Connection reset by peer, closing connection May 18 10:07:33 bilbo cyrus/imap[18778]: Connection reset by peer, closing connection May 18 10:07:33 bilbo cyrus/imap[18777]: accepted connection May 18 10:07:33 bilbo cyrus/imap[18436]: accepted connection May 18 10:07:33 bilbo cyrus/imap[17449]: accepted connection May 18 10:07:33 bilbo cyrus/imap[17450]: accepted connection May 18 10:07:33 bilbo cyrus/imap[18775]: accepted connection May 18 10:07:33 bilbo cyrus/imap[18778]: accepted connection May 18 10:07:33 bilbo cyrus/imap[18777]: accepted connection May 18 10:07:33 bilbo cyrus/imap[18436]: accepted connection May 18 10:07:33 bilbo cyrus/imap[18778]: accepted connection May 18 10:07:33 bilbo cyrus/imap[18775]: Connection reset by peer, closing connection May 18 10:07:33 bilbo cyrus/imap[20005]: Connection reset by peer, closing connection May 18 10:07:33 bilbo cyrus/imap[18775]: accepted connection May 18 10:07:33 bilbo cyrus/imap[18778]: accepted connection May 18 10:07:33 bilbo cyrus/imap[18436]: accepted connection May 18 10:07:33 bilbo cyrus/imap[18775]: accepted connection May 18 10:07:33 bilbo cyrus/imap[18778]: accepted connection May 18 10:07:33 bilbo cyrus/imap[18436]: accepted connection May 18 10:07:33 bilbo cyrus/imap[20005]: accepted connection May 18 10:07:33 bilbo cyrus/imap[18775]: accepted connection May 18 10:07:33 bilbo cyrus/imap[17449]: Connection reset by peer, closing connection May 18 10:07:33 bilbo cyrus/imap[17450]: Connection reset by peer, closing connection ---- 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