meanwhile I have received the hint to make postgres use the index via


which fits perfectly. The execution plan now indicates full use of index.

Nevertheless this is merely a workaround. Maybe the io-costs are configured to 

thanks :-)

-----Ursprüngliche Nachricht-----
Von: Richard Huxton [mailto:[EMAIL PROTECTED]
Gesendet: Donnerstag, 13. Oktober 2005 12:22
An: Nörder-Tuitje, Marcus
Cc: pgsql-performance@postgresql.org
Betreff: Re: [PERFORM] Optimizer misconfigured ?

Nörder-Tuitje wrote:
> Hello, 
> I have a strange effect on upcoming structure :

People will be wanting the output of EXPLAIN ANALYSE on that query.

They'll also ask whether you've VACUUMed, ANALYSEd and configured your 
postgresql.conf correctly.

   Richard Huxton
   Archonet Ltd

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