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> 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. :) - -- Greg Sabino Mullane g...@turnstep.com End Point Corporation http://www.endpoint.com/ PGP Key: 0x14964AC8 201202082338 http://biglumber.com/x/web?pk=2529DF6AB8F79407E94445B4BC9B906714964AC8 -----BEGIN PGP SIGNATURE----- iEYEAREDAAYFAk8zTewACgkQvJuQZxSWSsiprACfTlYKiC4SS1UnERU+1N/2EGhJ s9AAoIXLJk88hoNHEkWKhUTqikDBtC/B =S65l -----END PGP SIGNATURE----- -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
