From: Frank Wiles <frank@wiles.org>
To: Andy <frum@ar-sd.net>
Cc: pgsql-performance@postgresql.org
Subject: Re: Improving Inner Join Performance
Date: Thu, 5 Jan 2006 13:20:06 -0600
Message-ID: <20060105132006.19c7cd31.frank@wiles.org> (raw)
In-Reply-To: <001d01c6120b$0d783600$0b00a8c0@forge>
References: <001d01c6120b$0d783600$0b00a8c0@forge>
On Thu, 5 Jan 2006 17:16:47 +0200
"Andy" <frum@ar-sd.net> wrote:
> Hi to all,
>
> I have the following query:
>
> SELECT count(*) FROM orders o
> INNER JOIN report r ON r.id_order=o.id
> WHERE o.id_status>3
> How can I improve this query's performace?? The ideea is to count all
> the values that I have in the database for the following conditions.
> If the users puts in some other search fields on the where then the
> query runs faster but in this format sometimes it takes a lot lot of
> time(sometimes even 2,3 seconds).
>
> Can this be tuned somehow???
Do you have an index on report.id_order ? Try creating an index for
it if not and run a vacuum analyze on the table to see if it gets
rid of the sequence scan in the plan.
---------------------------------
Frank Wiles <frank@wiles.org>
http://www.wiles.org
---------------------------------
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To: pgsql-performance@postgresql.org
Cc: frank@wiles.org, frum@ar-sd.net
Subject: Re: Improving Inner Join Performance
In-Reply-To: <20060105132006.19c7cd31.frank@wiles.org>
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