I can't sing the praises of Hubert 'depesz' Lubaczewski's explain tool too highly. Today I gave it the "explain analyze" output for a long and complex query and it immediately pinpointed the problem, and I am on the track of a solution that should reduce the time taken by a factor of 100 or so. This program makes the output from "explain analyse" much more tractable. If you do query performance work with PostgreSQL, you want to be using this tool. Thank you so much, depesz.
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