Alvaro Herrera wrote:
Jim C. Nasby wrote:
FWIW, I normally go with the 8.2 defaults, though I could see dropping
vacuum_scale_factor down to 0.1 or 0.15. I also think the thresholds
could be decreased further, maybe divide by 10.
How about pushing thresholds all the way down to 0?
As long as it handles small (or zero row) tables ok then yes. The
base_threshold in the originial contrib autovacuum was just an easy way
to not vacuum really small tables too often. If a table has only 10
rows, it's going to get vacuumed every time one row is updated. I guess
that's not a big problem with a table that small but still seems excessive.
If you think this isn't a problem with the current autovacuum, then sure
turn it down to zero, and perhaps we can even get rid of it altogether
in another release or two.
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TIP 2: Don't 'kill -9' the postmaster
