SQL Bayes behavior

[pm...@email.it]

Hi,

I've few question about the behavior of Bayes and SQL. Before the 
questions, i've followed this tutorial  
http://www200.pair.com/mecham/spam/debian-spamassassin-sql.html that 
should be the same thing of this: 
http://spamassassin.apache.org/full/3.0.x/dist/sql/README.bayes, my db 
are updated constantly, so it should woks.

1- In the "bayes_vars 
<http://192.168.1.36/phpmyadmin/sql.php?db=spamassassin&token=eea7fc1ed22ce035cad972e37fa36534&table=bayes_vars&pos=0>" 
table i've only a row for "amavis" user. Theoretically is it a good 
choise to use only one db for all users of my domain? (if i've 
understood well, spamassassin use this single db to store Bayes for all 
users of my domain)

2- How can i use single Bayes db for each users? Should i use 
"bayes_sql_override_username" ? I don't know where to get the right 
username.

3- Every 10-15 seconds, the counts of "ham_count" or "spam_count" in 
"bayes_vars 
<http://192.168.1.36/phpmyadmin/sql.php?db=spamassassin&token=eea7fc1ed22ce035cad972e37fa36534&table=bayes_vars&pos=0>" 
table increase without that any users send or receave mails. So, the 
behavior of spamassassin is to analize all mails presents in all my 
users's Maildirs?


Thanks :)
Marco