On 8.10.2010, at 17.26, Hugo Monteiro wrote: >> A couple weeks ago we had a major number of account migrations, from POP to >> IMAP. We started to notice that in times of peaks, specially after lunch >> hour, dovecot started to get REALLY slow and closing client connections. A >> restart to the service was enough to get things working again.
Dunno. >> Firstly i thought about the max fd number per process, but after checking it >> turned out it was already rather large, 8192 in our case. I cannot observe >> any concerning I/O load either. If there was a problem with lack of fds, it would log errors. > login_process_per_connection = yes > login_processes_count = 10 > login_max_processes_count = 40 > login_process_size = 64 Those are probably too low. Now you only make it possible to use 40 SSL connections at the same time. You should try high performance mode anyway: http://wiki.dovecot.org/LoginProcess
