[Dovecot] vsz_limit

Héctor Moreno Blanco hmoreno at gmv.com
Thu Feb 9 17:05:09 EET 2012

Hello Timo,

There is no other problem as far as I know. That's why I think is has something to do with dovecot. Specifically with the imap an imap-login process, as I observe in the processes status.
Anyway, the system load is not high enough to cause these problems. However, imap service doesn't work properly.

So, in order to enable the login process in high performance mode I add the parameter service_count = 0. Right?

I'll let you know if this helps.

Kind regards.

Héctor Moreno Blanco
División de Seguridad e Infraestructuras /
Security and Infrastructures Division
Isaac Newton, 11
P.T.M. Tres Cantos
E-28760 Madrid
Tel. +34 91 807 21 00
Fax +34 91 807 21 99 




-----Mensaje original-----
De: Timo Sirainen [mailto:tss at iki.fi] 
Enviado el: jueves, 09 de febrero de 2012 13:53
Para: Héctor Moreno Blanco
CC: dovecot at dovecot.org
Asunto: Re: [Dovecot] vsz_limit

On 9.2.2012, at 10.41, Héctor Moreno Blanco wrote:

> I can see these errors, but I'm not sure if they have something to do with my problem:
> ...
> Feb  8 12:04:57 XXXXXX dovecot: imap-login: Error: read(imap) failed: 
> Connection reset by peer Feb  8 12:04:57 XXXXXX dovecot: imap-login: 
> Error: read(imap) failed: Remote closed connection (process_limit 
> reached?) Feb  8 12:04:57 XXXXXX dovecot: imap-login: Error: 
> fd_send(imap, 16) failed: Broken pipe

imap service isn't responding.

> Feb  8 12:08:09 XXXXXX dovecot: imap-login: Error: master(imap): Auth 
> request timed out (received 0/12 bytes)

imap process isn't responding because auth process isn't responding.

> Do you see anything wrong?

Yes. Is the system load very high? That could explain this. Or do you see any other error messages? Those errors you pasted above show that something is wrong, but not the root cause of what's wrong.

> Anyway, I'm going to investigate what David Warden told me about the "High Security" mode, just in case it is related to my problem.

It could at least help reduce the load. Also it would be a good idea to upgrade to latest v2.0.

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