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Re: Very slow queries

From: Sidar López Cruz <sidarlopez(at)hotmail(dot)com>
To: pgsql-performance(at)postgresql(dot)org
Cc: tallen(at)blackducksoftware(dot)com
Subject: Re: Very slow queries
Date: 2007-01-30 21:19:41
Message-ID: BAY132-F115B53C5DBE5274BF8B1BECEA60@phx.gbl (view raw or flat)
Thread:
Lists: pgsql-performance


>From: Ted Allen <tallen(at)blackducksoftware(dot)com>
>To: Sidar López Cruz <sidarlopez(at)hotmail(dot)com>
>CC: pgsql-performance(at)postgresql(dot)org
>Subject: Re: [PERFORM] Very slow queries
>Date: Tue, 30 Jan 2007 16:14:38 -0500
>


>What indexes do those tables have?  Any?

Yes:
TABLE ceroriesgo.patronos ADD CONSTRAINT patronos_pkey PRIMARY 
KEY(numero_patrono);

INDEX salarios_numero_patrono_idx  ON ceroriesgo.salarios
  USING btree (numero_patrono);



>
>Sidar López Cruz wrote:
>>Check this:
>>
>>query: Delete From ceroriesgo.salarios Where numero_patrono Not In (Select 
>>numero_patrono From ceroriesgo.patronos)
>>
>>Seq Scan on salarios  (cost=51021.78..298803854359.95 rows=14240077 
>>width=6)
>>  Filter: (NOT (subplan))
>>  SubPlan
>>    ->  Materialize  (cost=51021.78..69422.58 rows=1032980 width=25)
>>          ->  Seq Scan on patronos  (cost=0.00..41917.80 rows=1032980 
>>width=25)
>>
>>
>>These query took a day to finish, how or who can improove better 
>>performance of my PostgreSQL.
>>
>>_________________________________________________________________
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>>
>>---------------------------(end of broadcast)---------------------------
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>>
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>>
>
>
>--
>
>*Edward Allen*
>Software Engineer
>Black Duck Software, Inc.
>
>tallen(at)blackducksoftware(dot)com <mailto:tallen(at)blackducksoftware(dot)com>
>T +1.781.891.5100 x133
>F +1.781.891.5145
>http://www.blackducksoftware.com
>

_________________________________________________________________
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