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
