On Mon, Jan 17, 2011 at 08:18:57AM +0200, Jaques Cochet wrote:
> If postfix alone is running on the server, let's say as a mail router
> or backend delivey system, would postfix processes make use of all
> cores? would I be left with cores doing nothing even If I have an
> important number of emails to process?
Generally, Postfix is I/O bound and and adding CPU does not dramatically
improve throughput. Adding disk spindles, NVRAM disk cache, ... will
likely help more if CPU is not consumed by content inspecition.
Add CPU when you notice that CPU utlitilization is high and impacts on
email delivery rates (delivery latency goes up as CPU utilization rises).
--
Viktor.
