Shridhar, > I would say -V 0.2-0.4 could be great as well. Fact to emphasize is that > thresholds less than 1 should be used.
Yes, but not thresholds, scale factors of less than 1.0. Thresholds should still be in the range of 100 to 1000. > I will submit a patch that would account deletes in analyze threshold. > Since you want to delay the analyze, I would calculate analyze count as > > n=updates + inserts *-* deletes I'm not clear on how this is a benefit. Deletes affect the statistics, too. > What does statistics gather BTW? Just number of rows or something else as > well? I think I would put that on Hackers separately. Number of tuples, degree of uniqueness, some sample values, and high/low values. Just query your pg_statistics view for an example. > I am still wary of inverting vacuum analyze frequency. You think it is > better to set inverted default rather than documenting it? See my post to Matthew. -- Josh Berkus Aglio Database Solutions San Francisco ---------------------------(end of broadcast)--------------------------- TIP 7: don't forget to increase your free space map settings
