Re: [PERFORM] Optimizer misconfigured ?

2005-10-14 Thread Nörder-Tuitje , Marcus 
Hi,

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

SET ENABLE_SEQSCAN=FALSE;

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 
cheap.

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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Re: [PERFORM] Optimizer misconfigured ?

2005-10-14 Thread Richard Huxton 

Nörder-Tuitje wrote:

Hi,

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


SET ENABLE_SEQSCAN=FALSE;

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


What execution plan? I still only see one message on the list.


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


Possibly - the explain analyse will show you.
--
  Richard Huxton
  Archonet Ltd


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Re: [PERFORM] Optimizer misconfigured ?

2005-10-13 Thread Richard Huxton 

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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TIP 6: explain analyze is your friend