[Dovecot] imap-login processes

[Timo Sirainen]

On Sun, 2008-05-25 at 05:08 +0300, Timo Sirainen wrote:
> On Mon, 2008-05-19 at 12:06 -0400, Bryan Polk wrote:
> > On Fri, 16 May 2008, Evaggelos Balaskas wrote:
> > 
> > > -----BEGIN PGP SIGNED MESSAGE-----
> > > Hash: SHA1
> > >
> > > I hope something like this could help you :
> > >
> > > # Authentication Cache
> > > auth_cache_size = 10240
> > > auth_cache_ttl = 18000
> > >
> > 
> > This may have done the trick! The number of imap-login processes has been 
> > holding around 60 all morning. 
> 
> So I guess most of the login processes were just waiting for
> authentication processes to respond? I hadn't thought about that. How
> many dovecot-auth processes do you have? Increasing
> auth_worker_max_count might be a good idea.

Or it should have actually logged an error in that case: "Couldn't
create new auth worker".

Maybe it's the passwd lookups that are slow? What NSS backend are you
using? It's probably a good idea to make them use auth workers also:

userdb passwd {
  args = blocking=yes
}

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