<quote who="Luc de Louw">

> I tested amavis a few months ago. It eats up a lot of CPU, and
> mailprocessing was very slow.
> its good for a one-user-private-mail-server, but not for lots of users,
> if there was no big change since then.
> It uncompresses all attachements and checks the uncompressed stuff for
> viruses.

how fast was the system you ran it on? the mail system that recieves
the most mail that I run gets an average of 227 messages/hour according
to mrtg. system load is an average of 0.03, system is Dual P3-733, 256MB
ECC ram, dual 10krpm drives in software raid1 for /var/spool (where all
mail is processed & stored). Maximum 5-minute load average for this
system over the past 5 weeks is 0.07. system runs amavis-perl-11
with sophos, and sendmail (with dual queue setup). with this setup
scanning a message takes about a second(recieve, scan, deliver)

> If I'm wrong please correct me.

not sure, the only time i had load problems on amavis was with the
old shellscript version with qmail.(this was in 2001) qmail would
never stop queueing mail if load got to 5 or 10 or 30 or 50, qmail
would keep queueing. combined with the crappy hardware(P2-450 256MB)
sometimes messages took a long time to deliver. combined with the
fact that some mail was scanned multiple times(bug in amavis at
the time i think, long since "fixed")

i am curious what kind of message load you have and what kind of
hardware?

my personal server recieves probably 600 messages/day and theres
no problems there either. P3-800 1.5GB ram (it does a lot of
other stuff other then mail) 4x9GB drives in raid5(software)

no matter what you run though, if your server processes a lot of
large attachments you will want a much faster system. I restrict
all mails to 10MB(without encoding it drops to about 6.7MB). my
main company mail hub averages 1.5MBytes/hour (in and out combined)
of mail over the past 5 weeks, so with my probably-wrong-math
it comes out to about 6.7kbytes per message.

i suppose if you receieve tens of thousands of messages per day
amavis may not scale well :) i haven't had any issues with my
loads though.

nate

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