[Dovecot] login_* options for 1.0.15

[Timo Sirainen]

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