On Thursday 17 of September 2015 Niels Dettenbach <nd@xxxxxxxxxxxx> wrote:
> Am Donnerstag, 17. September 2015, 14:19:42 schrieb Sebastian Hagedorn:
> > > Cyrus is running an a recently updated Ubuntu 14.04. lts server. Is
> > > there anything I can do?
> >
> > we are still on 2.4.x, but we had a similar problem that we resolved this
> >
> > way:
> > imap cmd="imapd -U 10" listen="imap.uni-koeln.de:imap" ...
>
> ...interesting to see that this happens on other Ubuntu systems as well - i
> saw this on some Ubuntu systems (only on Ubuntu setups) in the past too,
> without havin the option to dig in deeper what's happen there.
>
> If someone has further investigation results or experiences about this,
> this would be interesting...
I have set "imapd -U 30", maxchild=400, and I see gradual grow up of process
numbers. Some instances are very long lived, (almost 3 months). In
/var/lib/cyrus/procs I can see that some users have about a dozen of
connections to the same mailbox/folder (trash is a favorite). And also quite a
lot connections with no user associated. Thus from time to time (when I get
above 350 processes), I kill imapd processes with no user, or with duplicates
(same IP, same user). I just feel as if the -U option does not work well.
Just to note, the number of processes is decreasing during night, but the max
and min values grow each day. I have a graph if someone is interested.
--
Best Regards
Vladislav Kurz
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