On Sun, Dec 11, 2005 at 11:53:36AM +0000, Carlos Benkendorf wrote:
> I would like to use autovacuum but is not too much expensive
> collecting row level statistics?
The cost depends on your usage patterns. I did tests with one of
my applications and saw no significant performance difference for
simple selects, but a series of insert/update/delete operations ran
about 30% slower when block- and row-level statistics were enabled
versus when the statistics collector was disabled.
--
Michael Fuhr
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TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
