From: Ruben Rubio Rey <ruben@rentalia.com>
To: Doron Baranes <doron.baranes@dbnet.co.il>
To: pgsql-performance@postgresql.org
Subject: Re: Perfrmance Problems (7.4.6)
Date: Thu, 20 Apr 2006 12:48:38 +0200
Message-ID: <44476706.90303@rentalia.com> (raw)
In-Reply-To: <0BA77301DFF4B24C9C5DAA74138BF95001E231@exchange-1.dbnet.co.il>
References: <0BA77301DFF4B24C9C5DAA74138BF95001E231@exchange-1.dbnet.co.il>
I think that the problem is the GROUP BY (datetime) that is
date_trunc('hour'::text, i.entry_time)
You should create an indexe with this expression (if its possible).
http://www.postgresql.org/docs/7.4/interactive/indexes-expressional.html
If is not possible, I would create a column with value
date_trunc('hour'::text, i.entry_time) of each row and then index it.
Hope this helps :)
Doron Baranes wrote:
>Hi,
>
>I am running on postgres 7.4.6.
>I did a vacuum analyze on the database but there was no change.
>I Attached here a file with details about the tables, the queries and
>the Explain analyze plans.
>Hope this can be helpful to analyze my problem
>
>10x
>Doron
>
>
>------------------------------------------------------------------------
>
>
>---------------------------(end of broadcast)---------------------------
>TIP 9: In versions below 8.0, the planner will ignore your desire to
> choose an index scan if your joining column's datatypes do not
> match
>
>
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To: pgsql-performance@postgresql.org
Cc: ruben@rentalia.com, doron.baranes@dbnet.co.il
Subject: Re: Perfrmance Problems (7.4.6)
In-Reply-To: <44476706.90303@rentalia.com>
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