> I just have a couple of quick questions about 8.3 and Autovacuum. > > 1. When autovacuum chooses to vacuum a table, the entire table is vacuumed, > and not just a specified percentage of the table. Correct?
Yes.
> 2. There is no way, without turning autovacuum off, of excluding > vacuum/analyze during a specific period of time (say during a known peak > usage period).
Nope, no way. (You could have a script to update the pg_autovacuum.enabled flag, and change it using cron.)
> 3. If I have a PostgreSQL cluster with 10 databases, does > autovacuum_max_workers=3 mean I have a possibility of 3 total workers or 30 > workers (i.e. autovacuum_max_workers * number of db's)?