From: Stephan Szabo <sszabo@megazone.bigpanda.com>
To: Jan Kesten <jan.kesten@web.de>
Cc: pgsql-performance@postgresql.org
Subject: Re: index not used again
Date: Sun, 2 Apr 2006 12:46:55 -0700 (PDT)
Message-ID: <20060402124047.X46838@megazone.bigpanda.com> (raw)
In-Reply-To: <442FF9C0.2070702@web.de>
References: <442CF375.2080903@web.de>
<20060331064252.J61282@megazone.bigpanda.com>
<442FF9C0.2070702@web.de>
On Sun, 2 Apr 2006, Jan Kesten wrote:
> Stephan Szabo schrieb:
>
> > Did you reset the table contents between these two (remember that
> > explain analyze actually runs the query)? The second appears to be
> > changing no rows from the output.
>
> I for myself did not, but as there are runnig automatic jobs
> periodically I can't tell, if one ran in the time while I was testing
> (but I guess not). At starting my tests all rows contained a zero for
> all tokens and there should be no ones at all.
The reason I asked is that the explain analyze output for the first query
on fak6 (using a seqscan) seemed to imply 24k rows actually matched the
condition and were updated, so comparisons to the later times may be
skewed.
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To: pgsql-performance@postgresql.org
Cc: sszabo@megazone.bigpanda.com, jan.kesten@web.de
Subject: Re: index not used again
In-Reply-To: <20060402124047.X46838@megazone.bigpanda.com>
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