[Dovecot] Dovecot] dovecot performance question

[Paul Amaral]

Kenny, I think the time problem is related to the virtual server software
I'm using. But the head node has 2 dual core intel's with 8 gig's of ram
with 7,000 users. The cpu stays at about 60% idle. I will be moving away
from the virtual server stuff and into a stand alone server hopefully this
helps out the situation. 

-----Original Message-----
From: dovecot-bounces at dovecot.org [mailto:dovecot-bounces at dovecot.org] On
Behalf Of Kenny Dail
Sent: Tuesday, May 29, 2007 7:57 PM
To: dovecot at dovecot.org
Subject: Re: [Dovecot] Dovecot] dovecot performance question

> Hi, using the latest dovecot with pop3/imap. Using mostly outlook 2003 
> for
> pop3 and squirrel mail imap. 
> 
> I have a lot of users reporting back that imap is very slow. We 
> average about 300 imap and another 700 pop session at any given time.

reporting that imap is slow or that squirrelmail is slow? ;) How is the load
average on the server? We found at our site to keep Apache/squirrelmail
happy, we dedicated a server for our webmail users.
Mostly being a RAM issue in that case. Just how beefy is the server you are
using?

> I am having a time issue on this server and im not sure if its 
> affecting dovecot.
> 
> May 29 11:42:19 pop dovecot: POP3(xxx): Time just moved backwards by 1 
> seconds. I'll sleep now until w e're back in present.
> May 29 11:42:19 pop dovecot: POP3(xxx): Time just moved backwards by 1 
> seconds. I'll sleep now until w e're back in present.
> May 29 11:42:31 pop dovecot: POP3(xxx): Time just moved backwards by 1 
> seconds. I'll sleep now until w e're back in present.
> May 29 11:42:42 pop dovecot: POP3(xxx): Time just moved backwards by 1 
> seconds. I'll sleep now until w e're back in present.

It'll affect it in that you will be having 1 sec delays frequently it seems.
You should definitely look into fixing that. That is bad behavior for a busy
mail server.
--
Kenny Dail <kend at amigo.net>