From: Enrico Weigelt
Subject: index not used
Date: ,
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Responses: Re: index not used  (Darcy Buskermolen)
Re: index not used  (Stephan Szabo)
List: pgsql-performance

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index not used  (Enrico Weigelt, )
 Re: index not used  (Darcy Buskermolen, )
 Re: index not used  (Litao Wu, )
 Re: index not used  (Stephan Szabo, )

Hi folks,

I'm doing a simple lookup in a small table by an unique id, and I'm
wondering, why explains tells me seqscan is used instead the key.

The table looks like:

    id    bigint        primary key,
    a    varchar,
    b    varchar,
    c     varchar

and I'm quering: select * from foo where id = 2;

I've got only 15 records in this table, but I wanna have it as
fast as possible since its used (as a map between IDs and names)
for larger queries.

 Enrico Weigelt    ==   metux IT service

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From: Enrico Weigelt
Subject: foreign key performance
From: "Shoaib Burq (VPAC)"
Subject: Re: two queries and dual cpu (perplexed)