Extracting those last drops of performance

[Zaeem Arshad]

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