[Dovecot] Maybe wrong quota recalculation behaviour on overquota delivery try

[Luca Palazzo]

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
>
>