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Re: Inner Join of the same table - Mailing list pgsql-performance

From Jim Nasby
Subject Re: Inner Join of the same table
Date
Msg-id 165A9949-55BC-4BFC-9CEF-4F54B23731BE@pervasive.com
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In response to Re: Inner Join of the same table  (Sebastián Baioni <sebaioni-postgresql@yahoo.com.ar>)
List pgsql-performance
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On Aug 15, 2006, at 1:53 PM, Sebastián Baioni wrote:
>  9                          ->  Index Scan using uesapt001 on
> APORTES  (cost=0.00..37301678.64
> rows=9339331 width=25) (actual time=110.000..2520690.000
> rows=9335892 loops=1)

It's taking 2520 seconds to scan an index with 9M rows, which sounds
way, way too slow. I suspect that index got bloated badly at some
point by not vacuuming frequently enough (autovacuum is your friend).
Try reindexing and see if that fixes the problem.
--
Jim C. Nasby, Sr. Engineering Consultant      jnasby@pervasive.com
Pervasive Software      http://pervasive.com    work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf       cell: 512-569-9461

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