Pete

> Can
> > it be that it's overloaded? What kind of messages/sec are we talking about
> > here?
> 
> It works fine even with 16 concurrent smtpds and perls going and things - it
> is just the moment
> |-perl5.8.0(6211)---sh(6257)---reformime(6263)
> |-perl5.8.0(6214)---perl5.8.0(6264)
> turns up 4 or 5 times or more it slows right down and my load avg goes up
> from 1-3 to 7 to 15.
> 
> It is doing about maybe 5 - 10 mesg a second a peak time - 40 k - at the
> moment maybe 1 every few seconds?
> 

One thing you've never said is if this has ever worked OK for you - or is
this the first time you've had a go an AV scanning on your Qmail servers? 

In your original msg you said these were RAID-1 IDE disks - I wonder just
how well they'll handle the load. As the Q-S docs say, running AV software
over each and every mail message adds a HUGE load to a box. Another AV SMTP
product I know of says that it takes 10x the hardware to deal with the same
amount of e-mail once you turn AV scanning on - so if your boxes were >10%
busy before you enabled Q-S - you may indeed find the box isn't up to the
load.

RAID-1 means write every file TWICE - once to each disk. Q-S does lots of
I/O while scanning,etc...

I run SCSI-based servers that handle a similar load - and I MADE SURE I put
the /var/ partition onto a non-RAIDed disk for these very reasons. Oh yeah -
and we have TWO of those boxes - not one...


In the end - I don't know. I don't have enough information about your
environment and history to know whether this is a new problem, or a problem
that has occurred since you started using Q-S...

-- 
Cheers

Jason Haar
Information Security Manager, Trimble Navigation Ltd.
Phone: +64 3 9635 377 Fax: +64 3 9635 417
PGP Fingerprint: 7A2E 0407 C9A6 CAF6 2B9F 8422 C063 5EBB FE1D 66D1


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