> Ed Loehr wrote:
>
> > ... it is a well-known "postgresqlism"
> > that you should consider running vacuum analyze at least nightly, possibly
> > more frequently. [I run it hourly.]
>
> I think there must be something wrong with the optimiser that it's
> "postgresqlism" that you must vacuum analyze frequently. Just as an example,
> for Clipper (dBase compiler), it's Clipperism that you must re-index if you
> cannot locate some records just because the indexing module screws up.
Vacuum collects stats on table size on every run. Vacuum analyze every
night is a waste unless the tables are really changing dramatically
every day.
--
Bruce Momjian | http://www.op.net/~candle
pgman@candle.pha.pa.us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026
