Rick, 22.04.2010 22:42:
>
> So, in a large table, the scale_factor is the dominant term. In a
> small table, the threshold is the dominant term. But both are taken into
> account.
>
> The default values are set for small tables; it is not being run for
> large tables.
With 8.4 you can adjust the autovacuum settings per table...