Re: Big diference in response time (query plan question)

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> -----Original Message-----
> From: pgsql-performance-owner@xxxxxxxxxxxxxx 
> [mailto:pgsql-performance-owner@xxxxxxxxxxxxxx] On Behalf Of 
> Luiz K. Matsumura
> 
> 
> Where I can see the current random_page_cost value ? There 
> are some hint 
> about what value I must set ?
> Thanks in advance.
> Luiz

On Linux the random_page_cost is set in the postgresql.conf file.  You can
see what it is set to by typing "show random_page_cost".  This page has some
guidelines on random_page_cost and other server settings:

http://www.powerpostgresql.com/PerfList/

As it says on the page, make sure you test a variety of queries.



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