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From: Justin Graf <justin@magwerks.com>
To: pgsql-general@postgresql.org, "Satish Burnwal (sburnwal)" <sburnwal@cisco.com>
To: Bill Moran <wmoran@potentialtech.com>
Subject: Re: Query is stuck
Date: Wed, 14 Apr 2010 09:47:05 -0400
Message-ID: <4BC5C759.40403@magwerks.com> (raw)
In-Reply-To: <3A8C969225424C4D8E6BEE65ED8552DA0119F417@XMB-BGL-41C.cisco.com>
References: <3A8C969225424C4D8E6BEE65ED8552DA0119F188@XMB-BGL-41C.c?= =?utf-8?Q?isco.com>
	<o2ne4edc9361004130603r9acb3257yb800890f447eb2ce@mail.gma?= =?utf-8?Q?il.com>
	<20100413091248.a295737b.wmoran@potentialtech.com>
	<3A8C9692?= =?utf-8?Q?25424C4D8E6BEE65ED8552DA0119F1AD@XMB-BGL-41C.cisco.com>
	<6013c776bd?= =?utf-8?Q?38b7738ff9e43815ce8adc@mail.gransy.com>
	<3A8C969225424C4D8E6BEE65ED?= =?utf-8?Q?8552DA0119F3EE@XMB-BGL-41C.cisco.com>
	<20100414083622.dcf54d70.w?= =?utf-8?Q?moran@potentialtech.com>
	<3A8C969225424C4D8E6BEE65ED8552DA0119F4?= =?utf-8?Q?17@XMB-BGL-41C.cisco.com>

On 4/14/2010 9:20 AM, Satish Burnwal (sburnwal) wrote:
>   Index Scan using repcopy_index on repcopy a  (cost=0.00..87824607.17
> *rows=28*  width=142) (actual time=11773.105..689111.440*rows=1*  loops=1)
>     Index Cond: ((dm_user)::text = 'u3'::text)
>     Filter: ((report_status = 0) AND (report_time = (subplan)))
>     SubPlan
>       ->   Aggregate  (cost=3531.30..3531.31 rows=1 width=8) (actual
> time=58.447..58.448 rows=1 loops=11788)
>             ->   Index Scan using repcopy_index on repcopy b
> (cost=0.00..3526.30*rows=2000*  width=8) (actual time=0.017..36.779
> *rows=25842*  loops=11788)
>                   Index Cond: ((($0)::text = (dm_user)::text) AND
> (($1)::text = (dm_ip)::text))
>                   Filter: ((ss_key)::text<>  ''::text)
>   Total runtime: 689111.511 ms
> (9 rows)
>    

The estimated cost and actual are way off.  Have you run Analyze on the 
table

you may want to change the statistics collected for this table

http://www.postgresql.org/docs/8.1/static/planner-stats.html

  ALTER [ COLUMN ]/column/  SET STATISTICS/integer/

http://www.postgresql.org/docs/8.1/static/sql-altertable.html




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