[Dovecot] dovecot performance

Giorgenes Gelatti giorgenes at gmail.com
Thu Aug 14 22:46:04 EEST 2008


Woa!!

Do you have statistics of access/min for pop3?

Indeed it could be premature since I didn't measure any real
bottleneck. Just something that got my attention.

[]'s
giorgenes

2008/8/14 Jose Celestino <japc at co.sapo.pt>:
> Words by Giorgenes Gelatti [Thu, Aug 14, 2008 at 03:38:50PM -0300]:
>> Hello All,
>>
>> I've been studying dovecot for replacing my company's current system
>> and I got a little worried about an aspect of the dovecot's design.
>> I was surprised that dovecot doesn't use prefork for its mail
>> processes, forking a new processes for each new client connection.
>>
>> Talking in the #dovecot channel I was gave a scenario of a system
>> supporting ~40k users with 4 servers just fine.
>> I wonder how well dovecot would scale if we increase this number of
>> users by some order of magnitude like, say, 4M users.
>>
>
> Well, we have 8 servers for that amount of users.
>
>> It is well known that preforking is a good pratice if you want to
>> achieve a higher performance.
>
> Some say it's premature optimization.
>
>> When I was asked about it I readily answered: "of course it does". For
>> my surprise later, i doesn't.
>>
>> Do you have any plans to support preforking in the near future?
>>
>
> --
> Jose Celestino | http://japc.uncovering.org/files/japc-pgpkey.asc
> ----------------------------------------------------------------
> "One man's theology is another man's belly laugh." -- Robert A. Heinlein
>


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