On Wed, Mar 25, 2009 at 10:30:26AM -0500, Noel Jones wrote:
> Jacky Chan wrote:
>> Hi all,
>> I am setup Postfix 2.5 to run on Linux box with 2 x 1.2 G PIII and 1280MB
>> RAM server.
>> I also setup a list of firewall rules (iptables) for restricting port 25
>> access.
>> In compare of own access table in Postfix, which way has better
>> performance
>> when the server is high-loaded? I noticed that there were some discussion
>> on
>> the performance of harddisk, but regarding to my assumption above, I think
>> hard disk performance may not be the biggest factor, is that true?
>> Best,
>> Jacky
>
> Postfix itself should run fine on such hardware. If you add filtering such
> as clamav and/or spamassassin you may have performance issues if you filter
> more than a few thousand messages per day.
More than a few hundred thousand. 86,400 seconds in a day, very few filters
use more than 1 CPU second per message. Most filters comfortably handle ~20
messages per second, very fast ones may handle 100 msgs/sec. High latency
(but not CPU hungry) filters may need high concurrency.
Bottom line, a typical machine will handle a few hundred thousand messages
a day (traffic will typically be concentrated in a few peak hours).
--
Viktor.
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