Separating master processes for different services to utilise multiple cores/cpus

[Raymond T. Sundland]

When master receives a connection, it spawns a child process to manage 
that connection.  That would essentially make it multi-threaded making 
use of the multiple CPUs when needed, I would think.  Is that not the 
case?  You can launch multiple master processes, but that wouldn't have 
any better guarantee to use multiple CPUs, either.


Atif Ghaffar wrote:
> Hello,
>
> I am a long time cyrus user but have not been hands on for a while.
> At my current job we are running cyrus to manage all mailstore for our 
> ISP.
>
> Recently I have migrate a couple of boxes to newer ones with more 
> cores per cpu.
>
> when running htop -u cyrus,  i see that only one core is being used 
> for most of the work and that seems to be a waste of the rest of the cpus.
>
> We are using the following services (imap, pop3, lmtp, sieve)
>
> One thought that comes to mind is to run different master processes 
> which do one service at a time.
>
> I am thinking on consolidating into
>
> 1. cyrus-master-main (running imap/sieve)
> 2. cyrus-master-pop3 (running pop3)
> 3. cyrus-master-lmtp (running lmtp)
>
> Does this makes any sense?
> Would this balance the usage of the CPUs.
>
> If yes, I will post the config files for inspection.
>
>
> best regards
> Atif
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