What is the maximum size the bayes database should grow to. Is ram the only limit to bayes database size?
No, there's a config file option which limits it's size.
bayes_expiry_max_db_size (default: 150000)
It's defined as the number of tokens to keep in the bayes db, and the default should limit you to about 8mb.. if you're over that, run sa-learn --force-expire to clean up old tokens.
See also the Mail::Spamassassin::Conf manpage.
It appears that once a bayes database gets too big, many messages will get scored to 50 because of all the conflicting tokens.
That's strange, never had that happen to me.
