On Tue, 9 Jul 2002, Auri Mason wrote:
> in order to measure the improve of performances after a vacuum+reindex (do
> you suggest something more?), I want to understand exactly the output of
> the explain command.
> After a google search I found a broken link posted by Tom.
As a suggestion, vaccum analyze rather than vacuum to get the stats
updated and I'd suggest checking chapter 11 of the user's guide if you're
using 7.2 which appears to have a section on explain.