On Thu, May 31, 2012 at 1:36 PM, Heikki Linnakangas < heikki.linnakan...@enterprisedb.com> wrote:
> I note that the calculations assume that leaf tuples and internal tuples > have similar sizes. We calculate the average leaf tuple size, and use that > to calculate the fan-out of internal pages. On some GiST opclasses, the > values stored on internal pages might be quite different from the leaf > tuples. I don't think we need to worry about that in practice, these > calculations are not very accurate anyway, but perhaps a comment would be > in order. > Probably we could collect per-level statistics of average tuple size? ------ With best regards, Alexander Korotkov.
