Mark Stosberg wrote:
> Let me ask the question a different way: Is simply setting the two
> values plus enabling autovacuuming generally enough, or is further
> tweaking common place?
No, most people in addition to setting those two GUC settings also lower
the threshold values (there is a fair amount of discussion on this in
the lists) the defaults are not aggressive enough, so you tables
probably aren't getting vacuumed often enough to keep up with the load.
Some work loads also require that you do cron based vacuuming of
specific highly active tables.
> Perhaps I'll give it another tree when we upgrade to 8.2.
Autovacuum is still somewhat new, and there were some significant
improvements in 8.2 so yes you should give it another try.