[Dovecot] Too many open files, etc.

[Martin Preen]

Timo Sirainen wrote:
> 
> On Mon, 2005-02-28 at 11:39 +0100, Martin Preen wrote:
> > Hello,
> > a few days ago I switched out UW-server installation to
> > dovecot 0.99.14 (Solaris 9). There were a few client issues,
> > but mostly the migration was ok.
> >
> > But I have still some questions/problems:
> >
> > +) dovecot-auth: ... PAM: pipe() failed: Too many open files
> > I increased the max. number of open files. Is this normal
> > behaviour, that more than 512 open files are needed ?
> 
> Depends on how many logins/sec you have. It's normal if you have >400/s,
> but probably not otherwise..

It's less than 400 login/s. I found that there were an increasing
number of login processes (about 500 extra processes per day).
In the web archive there is a similar posting (but no answer):
 http://dovecot.org/list/dovecot/2005-February/006238.html

I tried to fix it using the login parameters. Currently we use
login_process_per_connection=no which gives much less extra
processes (approx. 100 per day).

Martin

-----------------------------------------------------------------
Martin Preen, Universitaet Freiburg, Institut fuer Informatik
Georges-Koehler-Allee, Geb.52, Zi.00-006, 79110 Freiburg, Germany

phone: ++49 761 203-8250         preen at informatik.uni-freiburg.de
fax: ++49 761 203-8242           www.informatik.uni-freiburg.de