From: Adrian Ulrich (no email)
Date: Sun Oct 01 2006 - 04:04:17 EDT
> Looking at vmstat we see that when this happens the 'b' column seems high,
> 30+ values..
Are you using Linux or *BSD?
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:
Example output, showing a *very* busy 'sda' (svctm / %util)
# iostat -x 5
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
md0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
sda 4.99 0.00 153.49 1.00 6125.35 7.98 39.70 1.17 7.54 6.34 97.88
> Are we not having enough disk speed to process the load?
If sysstat/iostat shows high svctm/%util values: yes.
Otherwise your SQL-Server may be the bottleneck.
> Any way to decrease from the mailstore the amount of mail accepted to
> incoming and speedup delivery?
You could try to decrase the number of smtpd processes (master.cf) or
play with *_destination_concurrency_limit on your frontend servers.
> The two mailstores in question have the heaviest domains in terms of how
> much incoming traffic they get.
How about spreading the heavy-domains across multiple backends?
> Any recommendationgs greatly appreciated.
You are using Maildir, correct?
Regards,
Adrian
--
A. Top posters
Q. What's the most annoying thing on Usenet?
|
|
|