Optimizing setup (MS, Clamav and SpamAssassin)

[Robert Mena]

Hi,

I am newbie to the trio ms/clamav/ss so I am looking
for tips regarding optimizing results/performance.

I've already made it work in my devel machine but
moving to the production is another story.  First I'd
like to share my current setup and problems...

I use a qmail+rav (antivirus and antispam) and receive
10K messages during a normal day and up to 100K in a
spam/virus outbreak situation.

When this happens my users complain about the delay of
the email since it can take hours to be processed from
the queue to the user's maildir.

I am moving to exim+ms+clamav+ss and one of the
strategies I plan to adopt is to have diferent
incoming queues.  The "standard" exim.in queue and
another exim2.in to be used when the source address
belongs to certain classes (for ex. dsl/cable
companies).

I'd have another process of exim running in a diferent
port (ex. 26) with iptables redirecting.  This exim
would have more restrictive settings (such as lower
number of connections, cc's etc).  Since most of my
spam/virus comes from those
broadband-dont-upgrade-machines I'd would end up with
a lower queue of spam/virus.

>From MS seems easy since I can define the incoming
queues in a separate file (/var/spool/exim.in/incoming
and /var/spool/exim2.in/incoming) but how about other
tweaks ?

Like using clamav this way or another, number of
instances of MS, SpamAssassin etc.

My production machine is a Pentium 4 HT 2.8Ghz with
1Gb RAM DDR 400.

Mem:  1029916K av, 1011488K used,   18428K free,
0K shrd,  467756K buff  323068K cached

Thanks.

-rt

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