Re: PostgreSQL performance issues - Mailing list pgsql-performance

am  Tue, dem 29.08.2006, um 15:52:50 +0200 mailte Willo van der Merwe folgendes:
> and it has 743321 rows and a explain analyze select count(*) from
> property_values;
>                                                             QUERY
> PLAN
>
----------------------------------------------------------------------------------------------------------------------------------
>  Aggregate  (cost=55121.95..55121.96 rows=1 width=0) (actual time=
> 4557.797..4557.798 rows=1 loops=1)
>    ->  Seq Scan on property_values  (cost=0.00..51848.56 rows=1309356 width=0)
> (actual time=0.026..2581.418 rows=1309498 loops=1)
>  Total runtime: 4557.978 ms
> (3 rows)
>
> 4 1/2 seconds for a count(*) ? This seems a bit rough - is there anything else

Because of MVCC.
http://www.thescripts.com/forum/thread173678.html
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http://www.varlena.com/GeneralBits/49.php


Andreas
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Andreas Kretschmer
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