Re: Index problem - Mailing list pgsql-performance

> > What causes this behaviour? is there any workaround? Suggestions?
> >
>
> How many rows are there in the table, and can you post the
> 'explain analyze' for both queries after doing a 'vacuum verbose analyze
> [tablename]'?

There are about 2500 rows in that table.

1st query explain analyze: Seq Scan on PRIORITY_STATISTICS
(cost=0.00..491.44 rows=127 width=12) (actual time=98.58..98.58 rows=0
loops=1)
Total runtime: 98.74 msec

2nd query explain analyze: NOTICE:  QUERY PLAN:

Index Scan using PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id, PRIORITY_STATISTICS_reo_id,
PRIORITY_STATISTICS_reo_id on PRIORITY_STATISTICS  (cost=0.00..394.06
rows=102 width=12) (actual time=20.93..20.93 rows=0 loops=1)
Total runtime: 21.59 msec

Any help?

Rigmor


>
> Cheers
>
> Matt
>
>
>
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