AutoVaccuum process start as its off in potgresql.conf]

Hi ,

I am using PostgreSQL 8.3 version . The autovacuum process is stucking
my system as it automtically start even though its off is
postgresql.conf.

2. Is there any benchmark tool for Autovacuum process or can we know how much time this proces will take to complete?


Thanks in Advance.

Regards
Amit