Josh Berkus <josh@agliodbs.com> writes: > Tom, how does our heuristic sampling work? Is it pure random sampling, or > page sampling?
Manfred probably remembers better than I do, but I think the idea is to approximate pure random sampling as best we can without actually examining every page of the table. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 6: Have you searched our list archives? http://archives.postgresql.org