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From Apache Wiki <>
Subject [Spamassassin Wiki] Update of "FasterPerformance" by Darxus
Date Tue, 28 Feb 2012 15:41:38 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Spamassassin Wiki" for change notification.

The "FasterPerformance" page has been changed by Darxus:

Added "More general advice" section, mostly copied from a post by John Hardin to
- could probably use tidying

  Warning: Enabling this will almost certainly slow down !SpamAssassin.  Possibly a lot (I
haven't checked).
+ == More general advice ==
+ SA should log per-message scan times to the system log. From that you should be able to
determine a message recipient and message-ID for 
+ messages that take a long time to scan. 
+ You may also be experiencing inbound traffic volume spikes that may be overloading your
+ So, if you can track when the processing spikes occur, two things to correlate are the number
of messages you're processing at that time (you may have too many spamd children defined,
or not enough memory - are you hitting swap?), and any specific messages received at that
time that take an unusually long time to scan (they may be exercising weaknesses in the rules).

+ Older versions have had 
+ rules that were known to perform poorly in certain situations and that 
+ have been fixed in newer versions. 

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