[Dovecot] lstats on all files in Maildir when opening an e-mail.

[Daniel Watts]

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.
>