We ran into a similiar problem after migrating to Dovecot on Solaris with
an LVS in front. Tweaking some config options cleared it up. Specifically
turning on auth_cache:
# Authentication Cache
auth_cache_size = 10240
auth_cache_ttl = 18000
It went from hundreds of login processes down to 20-60.
Bryan Polk
Unix Systems Administrator
Communication and Multimedia Services
FAMU-FSU College of Engineering
(850) 410-6164
[EMAIL PROTECTED]
On Mon, 30 Jun 2008, Adam McDougall wrote:
I think today just due to increased use, my mail servers hit
login_max_processes_count. It wasn't obvious what was happening, logins just
weren't acting like they should and sometimes would get disconnected before
given a prompt from the server. Something made me think to check if I had
too many of certain dovecot processes and I found I had 128 imap-login
processes on both servers, but nothing in the logs seemed to point that out
for me. Should there be? It would have been alot easier to debug. Also,
this seems to be from general use, doesn't seem like a DoS, so is this just a
setting I should keep an eye on and increase it by reasonable amounts as
needed? Thanks.
