Spam-Assassin Benchmarks (was Re: LINUX vs FreeBSD mysql performance using a large RT database

Mike Tancsa mike at
Tue Oct 24 15:23:17 UTC 2006

At 04:21 PM 10/20/2006, Mike Tancsa wrote:

>The next set of comparisons I want to run is in our spam 
>scanners.  The boxes which operate in round robin make heavy use of mysql, DNS

OK, we are just getting ready to run some tests for this 
setup.  SpamAssassin has some built in benchmarking that we will 
use.  e.g. scan a set 500 spam messages, scan 5 sets using 5 
different processes at the same time, scan 10 etc and measure time taken.

The applications make heavy use of perl and mysql as well as netio 
(numerous DNS lookups)

For FreeBSD tweaking, does anyone have any suggestions or requests 
what we should tweak or test to see how things perform ?

Anecdotal evidence shows us that AMD64, consistently runs at a higher 
load avg than the others, despite having an equal mix of spam thrown 
at it.  One thing I am not sure of however is if this is truly slower 
(I suspect yes) or if there are differences in how load average is 
calculated on i386 vs AMD64 ?


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