dovecot - Dec 2009 - lot's of timeouts

Hi,

since some time ago we do have a lot of "timeouts" connecting to our
imap/po3 server. This week I switched the whole system to a new dual
quadcore xeon, 24GB RAM, SAS2 RAID-10. (SUN Fire 4170)

But the mailclients (mostly thunderbird and apple mail) still reporte
the timeouts by accessing the mailboxes.

The server is doing smtp, imap/pop3, webmailsystem and
spam/antivirus-checking all together. (RH EL 5, sendmail, horde, mysql,
mailscanner, spamassassin)

We use the original RH dovecot-1.0.7, mbox-format and mailboxes up to 4
GB ... (historicaly grown ...)

So where to start debugging the imap/pop3 timeouts? What information may
I provide, which doc may I read?

Thanks for helping me to find and fix the problem.


Best regards

	G?tz
-- 
G?tz Reinicke
IT-Koordinator

Tel. +49 7141 969 420
Fax  +49 7141 969 55 420
E-Mail goetz.reinicke at filmakademie.de

Filmakademie Baden-W?rttemberg GmbH
Akademiehof 10
71638 Ludwigsburg
www.filmakademie.de

Eintragung Amtsgericht Stuttgart HRB 205016
Vorsitzende des Aufsichtsrats:
Prof. Dr. Claudia H?bner
Staatsr?tin f?r Demographischen Wandel und f?r Senioren im Staatsministerium

Gesch?ftsf?hrer:
Prof. Thomas Schadt

On Dec 18, 2009, at 10:56 AM, G?tz Reinicke - IT-Koordinator wrote:
> But the mailclients (mostly thunderbird and apple mail) still reporte
> the timeouts by accessing the mailboxes.
> 
> The server is doing smtp, imap/pop3, webmailsystem and
> spam/antivirus-checking all together. (RH EL 5, sendmail, horde, mysql,
> mailscanner, spamassassin)
> 
> We use the original RH dovecot-1.0.7, mbox-format and mailboxes up to 4
> GB ... (historicaly grown ...)
Have you set mbox_very_dirty_syncs=yes?
> So where to start debugging the imap/pop3 timeouts? What information may
> I provide, which doc may I read?
Anything in logs? Anyway my guess is that it spends all the time reading those 4
GB mailboxes..