Postgresql 8.2 AUTOVACUUM LOG

Bonjour a Tous,

There is an AUTOVACUUM capability embedded within
PostgreSQL 8.2 (fedora core 7, postgresql-8.2.5-1.fc7)
How/where can I see in the log if indeed Autovacuum
started itself??
How can I trigger Autovacuum execution (as it
will do by itself)???

Here is the relevant part of my postgresql.conf

;----------------------------------
#to have autovacuum started
autovacuum = true
autovacuum_naptime = 1min
#debug flag
log_min_messages = debug2
client_min_messages = debug2
;-----------------------------------

After days my DB intense activity, I have
no proof autovacuum started itself...
What am I missing here?

Thanks for help or hints.

--
A bientôt
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