Hi Daniel,
Did you just implement Maildir++ quotas? If you did, it may be busy recalculating the "maildirsize" file for the first time.
There's an interesting read on how/when this is done: http://www.inter7.com/courierimap/README.maildirquota.html
Otherwise you may need to trace what the processes are really doing on disk.
I'm sorry I can't share with you our system load; we are running a department server with about 30-odd users (and it's on a SAN!)... so I don't think the load that we have is really that significant. :P
Cheers, TAN Shao Yi
On Tue, 27 Feb 2007, Daniel Watts wrote:
Hi Tan Shao,
Thanks for the fast reply =) My sysadmin also found that link and has tried putting it into place. Seems like it has solved the problem nicely.
We are still seeing 99%-100% disk usage though which is a little worrying:
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sda 4.80 16.50 86.50 34.70 3464.80 730.60 1732.40 365.30 34.62 27.38 224.38 8.25 100.04
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sda 4.00 8.99 74.93 33.57 2618.98 1175.72 1309.49 587.86 34.98 20.10 187.70 9.21 99.94
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sda 1.80 36.84 49.25 47.75 1508.71 1114.61 754.35 557.31 27.05 41.22 424.25 10.32 100.10
Do you get think kind of load when Dovecot is busy? We have about 50 dovecot processes running.
Best wishes, Daniel
Tan Shao Yi wrote:
On Tue, 27 Feb 2007, Daniel Watts wrote:
Hi guys - So what can we use instead? We've just had 2 days downtime because Dovecot was using 100% of the disk. As reported above - every action on a user mailbox seems to lstat every file in the user's home.
So we've disabled quota completely and these millions of lstats have stopped.
We're running virtual users (all under a vmail system user) so fs quota is not workable. What do you recommend for a Maildir?
This is bad enough to almost work having Dovecot throw a: WARNING: dirsize not recommended with Maildir format.
Hi Daniel,
I am now using Maildir++ quotas (http://wiki.dovecot.org/Quota/Maildir).
Cheers.