Re: why Sequencial Scan when selecting on primary key of table? - Mailing list pgsql-performance

On Sat, May 31, 2003 at 12:30:40PM -0400, Brian Tarbox wrote:
> I have a simple table with a dozen integer fields and a primary key.
>
> When I say "explain select * from Patient where Patient_primary_key = 100"
>
> I get sequential scan.
>
> I've just converted my application from MySQL and am seeing everything run
> about 3X slower.  What do I have to do to get postgres to use indexes?

Usual questions: have you vacuumed?  EXPLAIN ANALYSE output, schema,
&c.

A

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