V?ctor Rubiella Monfort:
> Hello,
>
> I'm was reading http://www.postfix.org/TUNING_README.html about increase
> number of process configurations related.
>
> We can increase smtp easly to 1000 connections for example to allow
> multiple incoming connections. But what about pickup and qmsg processes?
> by default is configuret to 1 process.
Not only by default; these programs will actually abort when you
change the limit. Likewise, some services such as cleanup require
no hard limit.
However, increasing the number of processes only improves performce
up to the point that the OS kernel can no longer provide resources
to all those running processes.
> I'm supose the best approach depends of a lot of diferent inpunts, but
> in general there are some tips to consider increase this values?, for
> example mantain the ratios 1/10 etc.. ? Prevent bottlenecks, excesive
> cpu/memory consumption increasing one of this procs,etc...
Primarily, common sense. If you raise the limit then you should
verify that Postfix can actually handle a sustainead load with that
level of concurrency. Postfix source comes with smtp-source and
smtp-sink for load testing, but I don't recall that I tested with
such a high concurrency level.
Wietse
