On 09/02/12 00:09, Greg Sabino Mullane wrote:
-----BEGIN PGP SIGNED MESSAGE-----
Hash: RIPEMD160
You can execute several queries with the three different values provided
by Scott and Josh.
- SET random_page_cost = 2.0
First execution of the queries with EXPLAIN ANALYZE
- SET random_page_cost = 1.4
Second execution of the queries with EXPLAIN ANALYZE
- SET random_page_cost = 1.2
Second execution of the queries with EXPLAIN ANALYZE
Well, such a tool would ideally be smarter than that, such that
you would run EXPLAIN and compare to the previous plan and
only run EXPLAIN ANALYZE if the plan changed. One could even
decrement rpc slowly and find out at one points it changes,
which would be more interesting than testing arbitrary numbers.
Would lead to some really sweet graphs as well. :)
Well, the MyYearBook.com´s guys built something seemed called Posuta, I
don´t know is this project is alive, but we can ask to them
(michael.glaesem...@myyearbook.com).
http://area51.myyearbook.com
Posuta can be a starting point for it. It uses Ruby and Clojure for core
functionalities, jQuery/Flot for graphics,
--
Marcos Luis Ortíz Valmaseda
Sr. Software Engineer (UCI)
http://marcosluis2186.posterous.com
http://www.linkedin.com/in/marcosluis2186
Twitter: @marcosluis2186
Fin a la injusticia, LIBERTAD AHORA A NUESTROS CINCO COMPATRIOTAS QUE SE
ENCUENTRAN INJUSTAMENTE EN PRISIONES DE LOS EEUU!
http://www.antiterroristas.cu
http://justiciaparaloscinco.wordpress.com
--
Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance
