Re: Very slow queries

>From: Ted Allen <tallen@blackducksoftware.com>
>To: Sidar López Cruz <sidarlopez@hotmail.com>
>CC: pgsql-performance@postgresql.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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>
>
>--
>
>*Edward Allen*
>Software Engineer
>Black Duck Software, Inc.
>
>tallen@blackducksoftware.com <mailto:tallen@blackducksoftware.com>
>T +1.781.891.5100 x133
>F +1.781.891.5145
>http://www.blackducksoftware.com
>

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