"Simon Riggs" <[EMAIL PROTECTED]> writes: > I'm slightly worried though since that seems to have changed from 8.2, > which I oprofiled over Christmas.
If you were testing a case with wider rows than Heikki tested, you'd see less impact --- the cost of the old way was O(N^2) in the number of tuples that fit on a page, so the behavior gets rapidly worse as you get down to smaller tuple sizes. (Come to think of it, the cmin/cmax collapse would be a factor here too.) regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 6: explain analyze is your friend