From: Tom Lane <tgl@sss.pgh.pa.us>
To: Frederic Back <fredericback@gmail.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: un-'vacuum analyse'
Date: Fri, 31 Mar 2006 11:27:10 -0500
Message-ID: <8960.1143822430@sss.pgh.pa.us> (raw)
In-Reply-To: <20060331180216.f25c3e91.fredericback@gmail.com>
References: <20060331180216.f25c3e91.fredericback@gmail.com>
Frederic Back <fredericback@gmail.com> writes:
> Is there a way to de-'vacuum analyse' a database for
> testing purposes?
"DELETE FROM pg_statistic" will get you most of the way there.
It doesn't get rid of the accurate relpages/reltuples entries
in pg_class, but since CREATE INDEX also updates those counts,
I think it's reasonable to consider that a freshly loaded database
would normally have correct counts.
regards, tom lane
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Subject: Re: un-'vacuum analyse'
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