Hi Timo,
thanks you for reply.
I'm pretty sure you are right. Quota recalculation based on Maildir++
standard is too I/O intensive for our system because we have lot of
maildirs migrated from old system. Mail files are missing often size in
filename so now I understand why so much stat calls.
Is there any script/util in dovecot to fix filenames?
Thank you.
Luca
On 09/02/2010 07:32 PM, Timo Sirainen wrote:
On Thu, 2010-09-02 at 19:14 +0200, Luca Palazzo wrote:
Looking at mbox servers log nothing seem to happen, but stracing lmtp
process we can see stat system calls to all Maildir files, as if
dovecot
was recalculating quota and regenerating maildirsize file.
It happens always when LMTP tries to deliver a mail to an overquota
account.
Yes, that's pretty much how Maildir++ quota works. If maildirsize file
doesn't only contain a single line showing the quota, or if it's older
than 15 minutes, it's recalculated. The maildir filenames really should
have ,S=size in the filenames, otherwise quota recalculation is horribly
slow.
Maybe you should switch to dict quota with file backend.
http://wiki2.dovecot.org/Quota/Dict
