| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
| Cc: | PostgreSQL-development <pgsql-hackers(at)postgreSQL(dot)org> |
| Subject: | Re: disbursion |
| Date: | 2000-06-01 23:48:55 |
| Message-ID: | 28910.959903335@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> Tom, since you check pg_statsistic in the optimizer for the most common
> value, should we downgrade the pg_attribute.attdisbursion value when we
> know the value is not the most common value? Are you doing that
> already?
Yeah, we already do. In fact the last tweak in that area was to reduce
the ratio we multiply by in just that situation. It's a poor substitute
for actually having better stats of course...
regards, tom lane
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