Debugging and resolving high loadavg when running MailScanner

[Randal, Phil]

Are you using razor or pyzor in that setup and does
 
  spamassassin -D --lint -p /etc/MailScanner/spam.assassin.prefs.conf
 
show any problems with either of these?
 
If so,
 
  razor-admin -discover
  pyzor discover
 
might be useful (I've put them in a cron job here).
 
Cheers,
 
Phil
 
----
Phil Randal
Network Engineer
Herefordshire Council
Hereford, UK
 

________________________________________________________________________________
From: MailScanner mailing list [mailto:MAILSCANNER at JISCMAIL.AC.UK]
On Behalf Of Richard Curtis
Sent: 16 February 2005 11:33
To: MAILSCANNER at JISCMAIL.AC.UK
Subject: Debugging and resolving high loadavg when running
MailScanner

Hi All,
  I have been running MailScanner (Version 4.35.11) for some time,
but over the last 2 -3 weeks, my loadavg has gone from ~0.10-0.20
to as high as 4.  This may not seem high to some, but as I have
other services on this box I want to try to reduce the load.
The box runs httpd, sendmail/MailScanner with clamav, radius and
pop.  There are multiple hosted domains on the server. 
The box is a dual AMD Athlon MP 1200 with 512MB RAM. 
 
All mail is scanned through MailScanner for virus's, but only a
small number of the domains (low traffic ones) have SpamAssassin
enabled in MailScanners configs.
I have to admit that I am a bit confused by some of the MailScanner
config options - for example, the effects of "Deliver In Background
= yes" and "Delivery Method = batch".
 
By setting the delivery method to queue, what kind of impact on
delivery time can I expect ?  Will this have a significant effect
of lowering the load ?
 
One other question, I note from looking through the logs, I see
entries like:
Feb 16 11:25:32 lancelot MailScanner[7544]: New Batch: Scanning 1
messages, 1720 bytes
Feb 16 11:25:32 lancelot MailScanner[7544]: MCP Checks completed at
1720 bytes per second
Feb 16 11:25:32 lancelot MailScanner[7544]: Spam Checks completed
at 1720 bytes per second
Now what confuses me here is that I have MCP checks and Spam checks
set to off for this mail domain - so why are the checks happening ?
 
Any suggestions on performance tuning of MailScanner, or possible
sendmail config tweaks would be greatly appreciated.
 
Regards
 
Richard

--
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.300 / Virus Database: 265.8.8 - Release Date: 14/02/05

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