[Dovecot] dovecot performance question

[Paul Amaral]

Jason, im also using virtual server software from virtual iron. I will be
also moving this off the virtual server and on to a dell 1900. Did you
notice better performance once you moved away from vmware ?

Thanks, Paul 

-----Original Message-----
From: dovecot-bounces at dovecot.org [mailto:dovecot-bounces at dovecot.org] On
Behalf Of Jason Godsey
Sent: Tuesday, May 29, 2007 10:19 PM
To: dovecot at dovecot.org
Cc: Paul A
Subject: Re: [Dovecot] dovecot performance question

I had this problem when running under vmware (time slippage).  I took vmware
out of the loop and all is well.

Also, you should be using ntpd, not cron and ntpdate -b.

Paul A wrote:
> 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.
>
> Here's my config:
>
> disable_plaintext_auth: no
> login_dir: /usr/local/var/run/dovecot/login
> login_executable(default): /usr/local/libexec/dovecot/imap-login
> login_executable(imap): /usr/local/libexec/dovecot/imap-login
> login_executable(pop3): /usr/local/libexec/dovecot/pop3-login
> login_greeting: Cape.Com D-V.1 ready.
> login_processes_count: 14
> max_mail_processes: 9000
> mail_location: maildir:/home/%1u/%u/Maildir
> mail_executable(default): /usr/local/libexec/dovecot/imap
> mail_executable(imap): /usr/local/libexec/dovecot/imap
> mail_executable(pop3): /usr/local/libexec/dovecot/pop3
> mail_plugin_dir(default): /usr/local/lib/dovecot/imap
> mail_plugin_dir(imap): /usr/local/lib/dovecot/imap
> mail_plugin_dir(pop3): /usr/local/lib/dovecot/pop3
> pop3_uidl_format(default):
> pop3_uidl_format(imap):
> pop3_uidl_format(pop3): %v.%u
> pop3_client_workarounds(default):
> pop3_client_workarounds(imap):
> pop3_client_workarounds(pop3): outlook-no-nuls oe-ns-eoh auth default:
>   count: 4
>   passdb:
>     driver: pam
>   userdb:
>     driver: passwd
>
> I'm trying to figure out what im doing wrong, I was seeing the same 
> performance issues with .99.
>
>
> Here's what im seeing for connections,
>
> [root at pop etc]# ps aux | grep pop3 | wc -l
> 562
> [root at pop etc]# ps aux | grep imap | wc -l
> 254
> [root at pop etc]#
>
> 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.
>
> Thanks,
>  
> P
>
>
>