From: Tom Lane <tgl@sss.pgh.pa.us>
To: Andrus <eetasoft@online.ee>
Cc: pgsql-performance@postgresql.org
Subject: Re: Query runs 38 seconds for small database!
Date: Mon, 08 May 2006 10:46:54 -0400
Message-ID: <26838.1147099614@sss.pgh.pa.us> (raw)
In-Reply-To: <e3n8at$1f7i$1@news.hub.org>
References: <e3n8at$1f7i$1@news.hub.org>
"Andrus" <eetasoft@online.ee> writes:
> I have small database. However the following query takes 38 (!) seconds to
> run.
> How to speed it up (preferably not changing table structures but possibly
> creating indexes) ?
ANALYZE would probably help.
> " -> Seq Scan on konto dbkonto (cost=0.00..23.30 rows=1
> width=44) (actual time=0.017..1.390 rows=219 loops=1)"
> " Filter: (iseloom = 'A'::bpchar)"
Anytime you see a row estimate that far off about a simple single-column
condition, it means your statistics are out-of-date.
regards, tom lane
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To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, eetasoft@online.ee
Subject: Re: Query runs 38 seconds for small database!
In-Reply-To: <26838.1147099614@sss.pgh.pa.us>
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