From: Francisco Reyes (no email)
Date: Mon Oct 02 2006 - 10:55:10 EDT
Adrian Ulrich writes:
> Are you using Linux or *BSD?
FreeBSD 6.1
> Running something like iostat (Solaris /BSD?) or sysstat (Linux: http://perso.orange.fr/sebastien.godard/)
> could give you a clue about how busy your Raid-system is:
Have used iostat and I see lots of small transactions.
> If sysstat/iostat shows high svctm/%util
What do you mean by "svctm/%util"?
> Otherwise your SQL-Server may be the bottleneck.
Eliminated 2 of the 3 SQL lookups and plan to remove the 3rd today.
> You could try to decrase the number of smtpd processes (master.cf) or
> play with *_destination_concurrency_limit on your frontend servers.
Ideally I would like to decrease incoming mails only to these two machines.
Other machines are fine.
> How about spreading the heavy-domains across multiple backends?
We have 4 mailstores. These two have the better hardware so we moved the
heaviest smtp traffic domains to these two machines. I am still trying to
convince the powers that be.. to get a SCSI setup for these domains.
> You are using Maildir, correct?
Correct. Maildir run off Courier IMAP, serving imap and pop3.
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