SpamAssassin & FuzzyOcr question

["sysadmin@destination.ca" <sy...@destination.ca>]

HI all,

I have been running sendmail dual mta+amavis+spamassassin+milter-spiff, 
also on every stmp there is a access-list that permit only working 
address to be accepted.

This setup as been working fine on 5 servers for a while now each 
servers blocking a average of 300K connections per days.

I also have system monitoring port 25 usage and if there to many 
connection to port 25 from the same ip address (20 hits+) at the same 
moment the ip address is automaticly added to the iptable of all the 
smtp server

I have been able to setup FuzzyOcr to run without problem.

The problem i have right now is that with FuzzyOcr eat quite a lot of 
cpu, since lowering the number of mta connection lower then 60 
connections at time is not viable, i was wondering if through 
spamassasin i could configure to skip FuzzyOcr plugin to be loaded 
depending on the cpu usage.

Thank in advance
Cedric