[Dovecot] enourmous amount of disc writes

[Rainer Sigl]

Hi Richard,
many thanks for you answer.
yes, this solution did we discuss as well. For a future testing system I 
will try this. But I can't use it on the living system in the moment.
Regards
Rainer

Richard Hobbs wrote:
> Hello,
> 
> You might also want to enable "noatime" in the mount options for the
> volume housing the data... if you're using maildir, this *could* reduce
> the number of writes by half, theoretically!
> 
> Richard.
> 
> 
> Robert Schetterer wrote:
>> Rainer Sigl schrieb:
>>> Hi List,
>>> on my mailserver (exim4, dovecot 1.0.0, postgresql, ubuntu dapper, about
>>> 500 users) I record an enourmous amount of disc writes (up to 18000
>>> blocks written each second) in the time where most of users are active.
>>> This IO activity causes wait-states on the disc interface (RAID5) and
>>> finally slows down my mailmachine. Is there a explanation for these disc
>>> writes respectively is there a possibility to minimize this activity.
>>> Stopping Dovecot on this machine causes stopping most of the disc activity.
>>>
>>> Regards
>>> Rainer Sigl
>>>
>>>
>> Hi Rainer first you should upgrade to the latest stable of the 1.x branch
>> or better 1.1.x, also dapper is very old perhaps try hardy
>>
>> then retest, i run 2000 users on suse with dovecot 1.0.15 and mysql
>> on sata 3ware hardware raid 1 500 GB on ext3 without any problems
>>
> 

-- 
-----------------
Rainer Sigl,                      | email: sigl at mpe.mpg.de
MPI f. extraterrestrische Physik, | phone: +49 (89) 30000-3557
Postfach 1312,                    | fax:   +49 (89) 30000-3569
D-85741 Garching, Germany         | web:   http://www.mpe.mpg.de/~sigl/
-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/x-pkcs7-signature
Size: 5804 bytes
Desc: S/MIME Cryptographic Signature
Url : http://dovecot.org/pipermail/dovecot/attachments/20090615/20adf682/attachment-0001.bin