From: Sushant Sinha <sushant354@gmail.com>
To: Kevin Grittner <Kevin.Grittner@wicourts.gov>
Cc: pgsql-performance@postgresql.org
Subject: Re: sequential scan unduly favored over text search gin index
Date: Mon, 20 Jun 2011 21:34:00 +0530
Message-ID: <1308585840.2488.13.camel@dragflick> (raw)
In-Reply-To: <4DFF27C5020000250003E9A4@gw.wicourts.gov>
References: <1308584339.2488.12.camel@dragflick>
<4DFF27C5020000250003E9A4@gw.wicourts.gov>
On Mon, 2011-06-20 at 10:58 -0500, Kevin Grittner wrote:
> Sushant Sinha <sushant354@gmail.com> wrote:
>
> > I have a tsvector column docvector and a gin index on it
> > docmeta1_docvector_idx
> >
> > I have a simple query "select * from docmeta1 where docvector @@
> > plainto_tsquery('english', 'free');"
> >
> > I find that the planner chooses a sequential scan of the table
> > even when the index performs orders of magnitude.
>
> Did you ANALYZE the table after loading the data and building the
> index?
Yes and I mentioned that the row estimates are correct, which indicate
that the problem is somewhere else.
-Sushant.
> -Kevin
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To: pgsql-performance@postgresql.org
Cc: sushant354@gmail.com, Kevin.Grittner@wicourts.gov
Subject: Re: sequential scan unduly favored over text search gin index
In-Reply-To: <1308585840.2488.13.camel@dragflick>
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