Re: Index Scans become Seq Scans after VACUUM ANALYSE

Bruce Momjian <pgman@candle.pha.pa.us>

From: Bruce Momjian <pgman@candle.pha.pa.us>
To: mlw <markw@mohawksoft.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, Andrew Sullivan <andrew@libertyrms.info>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2002-04-18T13:35:15Z
Lists: pgsql-hackers
mlw wrote:
> I don't think we will agree, we have seen different behaviors, and our
> experiences seem to conflict. This however does not mean that either of us is
> in error, it just may mean that we use data with very different
> characteristics.
> 
> This thread is kind of frustrating for me because over the last couple years I
> have seen this problem many times and the answer is always the same, "The
> statistics need to be improved." Tom, you and I have gone back and forth about
> this more than once.
> 

Have you tried reducing 'random_page_cost' in postgresql.conf.  That
should solve most of your problems if you would like more index scans.

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