Spam.blacklist.rules critical mass

[Jason Burzenski]

Does anyone know if there is a maximum limit to the number of entries in a
rules file?  I've been regularly adding entries to my spam.blacklist.rules
file which has now reached about 30K in size.  I haven't noticed much impact
on system performance or memory use but was wondering if someone else has
seen a direct correlation between a growing rules file and decreased system
performance?  At what level did your system start to choke?  Whats the best
practice for blacklisting?

Thanks,

Jason Burzenski
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