[Mimedefang] Server load

[Paul Norton]

Hi Jason,

Thanks for this summary. We just went into production a couple weeks ago with MIMEDefang/SpamAssassin running on two recycled 300MHz uniprocessor boxen. One of the boxen became wedged this morning due to load and never recovered. At least now I've got something to show the CTO when I ask for new hardware.

-----Original Message-----
From: Jason Abbott [mailto:teljanin at uga.edu]
Sent: Tuesday, October 15, 2002 8:47 AM
To: mimedefang at lists.roaringpenguin.com
Subject: [Mimedefang] Server load


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Ok; I just ran a test of my Mimedefang using a production queue of 19566 
messages.
The hardware in question is a Compaq ML-370, dual 1.2gHz, 4 GB ram, 2-9gig 
mirrored OS drives running ext3, and 2-36gig striped /var/spool running 
reiserfs.  I also have a 500 meg RAM disk for /var/spool/MIMEDefang.
Software is RedHat Linux 7.2 with all the security updates, Sendmail 8.12.6, 
Mimedefang 2.21, and SpamAssassin 2.41.  Spam Assassin was set with a 
threshold of 10, and mimedefang had 30 multiplexor processes running.

With that out of the way, now for the numbers:
Mimedefang/SA scanned 19566 messages in 39 minutes 32 seconds with a 
maximum delay of 2 minutes 40 seconds.
This translates to roughly 495 emails per minute scanned.
Of this 19566 emails, 33.8% (or 6617) were classified as spam.  Our highest 
scoring spam got a whopping 76.2.
The load got very high (over 90%) but the system was always very responsive, 
there was no slowdown at the command prompt.

So, anyone who wanted hard numbers, here you go.

FYI: I was sending the queue from a similar machine to this machine, then it 
was being forwarded to another machine to simulate an actual filter gateway.  
I am extremely pleased with performance so far.  I am going into production 
with this equipment Thursday evening.

- -- 
Jason Abbott
Productions Systems Support
Enterprise IT Services
University of Georgia
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