[Dovecot] Tuning Login processes for High-performance Mode

[Alessio Cecchi]

Il 20/12/2011 06:32, Timo Sirainen ha scritto:
> On 16.12.2011, at 14.06, Alessio Cecchi wrote:
>
>> I'm working for tuning a busy cluster of dovecot servers. Heach server as 4 core, 8GB of RAM and provide POP3 and IMAP access to mailbox. OS is Debian 6.0 and dovecot version is 1.2.15.
>>
>> I am unsure how to set "login_max_processes_count" and "login_max_connections" for reach the best situation when login_process_per_connection is set to no.
>
> They need to be high enough to handle all the concurrent login / SSL connections.
>
>> I don't know what value to set login_max_processes_count.
>
> This doesn't matter so much as login_processes_count. In normal operation the login_processes_count should be around 1-2x of the number of CPU cores. There's no reason to create more processes, so the login_max_process_count might as well be the same as login_processes_count. The login_max_connections then just needs to be high enough.
>

Thanks Timo,

I had read on wiki the ratio from core and login_processes_count, but I 
did not understand the ratio from login_processes_count and 
login_max_processes_count.

So, if I have 4 core and want to serve up to 1024 users, an example of 
configuration can be:

login_processes_count = 4
login_max_processes_count = 8
login_max_connections = 128

Right?
-- 
Alessio Cecchi is:
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