Re: Need help with one query

From: Alvaro Herrera
Subject: Re: Need help with one query
Date: ,
Msg-id: 20090320191453.GM8313@alvh.no-ip.org
(view: Whole thread, Raw)
In response to: Re: Need help with one query  (Robert Haas)
Responses: Re: Need help with one query  (Anne Rosset)
List: pgsql-performance

Tree view

Need help with one query  (Anne Rosset, )
 Re: Need help with one query  (Richard Huxton, )
  Re: Need help with one query  (Tom Lane, )
  Re: Need help with one query  (Anne Rosset, )
   Re: Need help with one query  (Robert Haas, )
    Re: Need help with one query  (Alvaro Herrera, )
     Re: Need help with one query  (Anne Rosset, )
      Re: Need help with one query  (Robert Haas, )
    Re: Need help with one query  (Tom Lane, )
     Re: Need help with one query  (Anne Rosset, )
      Re: Need help with one query  (Robert Haas, )
       Re: Need help with one query  (Anne Rosset, )

Robert Haas escribió:

> Something is wrong here.  How can setting enable_seqscan to off result
> in a plan with a far lower estimated cost than the original plan?  If
> the planner thought the non-seq-scan plan is cheaper, it would have
> picked that one to begin with.

GEQO?  Anne, what's geqo_threshold set to?

--
Alvaro Herrera                                http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.


pgsql-performance by date:

From: Robert Haas
Date:
Subject: Re: Proposal of tunable fix for scalability of 8.4
From: "M. Edward (Ed) Borasky"
Date:
Subject: "iowait" bug?