Extracting those last drops of performance

[Randal, Phil]

Does vmstat show any swapping going on?  If so, reduce the number of
children.

You might wish to play with the 

  Max SpamAssassin Size

setting, too.

Cheers,

Phil
--
Phil Randal | Networks Engineer
NHS Herefordshire & Herefordshire Council  | Deputy Chief Executive's
Office | I.C.T. Services Division
Thorn Office Centre, Rotherwas, Hereford, HR2 6JT
Tel: 01432 260160
email: prandal at herefordshire.gov.uk

Any opinion expressed in this e-mail or any attached files are those of
the individual and not necessarily those of Herefordshire Council.

This e-mail and any attached files are confidential and intended solely
for the use of the addressee. This communication may contain material
protected by law from being passed on. If you are not the intended
recipient and have received this e-mail in error, you are advised that
any use, dissemination, forwarding, printing or copying of this e-mail
is strictly prohibited. If you have received this e-mail in error please
contact the sender immediately and destroy all copies of it.
-----Original Message-----
From: mailscanner-bounces at lists.mailscanner.info
[mailto:mailscanner-bounces at lists.mailscanner.info] On Behalf Of Zaeem
Arshad
Sent: 04 May 2010 17:44
To: MailScanner discussion
Subject: Extracting those last drops of performance

Hi List,

My MailScanner+Postfix rejects roughly 8 million spam messages a day on
MTA level while around 1.2 million are passed on to MailScanner for
scanning. The system is a dual quad core 2.5 GHz system with 24 GB RAM
today. At times, MailScanner is unable to keep up with the number of
spam messages that escape the MTA checks and are submitted to
MailScanner causing huge delays. I am just wondering if tweaking the
following settings can get me improved performance.

Max Children = 40
Max Unscanned Bytes Per Scan = 100m
Max Unsafe Bytes Per Scan = 50m
Max Unscanned Messages Per Scan = 50
Max Unsafe Messages Per Scan = 50
Max Normal Queue Size = 70000


I am using caching dns, ram disk for processing, clamd, compiled
spamassassin rules and optimized scheduler and filesystems in this
server. Any ideas on how I can tweak the above settings to gain more
MailScanner performance?


Regards

--
Zaeem
--
MailScanner mailing list
mailscanner at lists.mailscanner.info
http://lists.mailscanner.info/mailman/listinfo/mailscanner

Before posting, read http://wiki.mailscanner.info/posting

Support MailScanner development - buy the book off the website! 
Any opinion expressed in this e-mail or any attached files are those of the individual and not necessarily those of Herefordshire Council.
You should be aware that Herefordshire Council monitors its email service.
This e-mail and any attached files are confidential and intended solely for the use of the addressee. This communication may contain material protected by law from being passed on. If you are not the intended recipient and have received this e-mail in error, you are advised that any use, dissemination, forwarding, printing or copying of this e-mail is strictly prohibited. If you have received this e-mail in error please contact the sender immediately and destroy all copies of it.