On Jun 22, 2007, at 14:11 , cluster wrote:
> What is the fan-out (number of child nodes) on each B-tree node in
> postgresql? Is it dependent of the size of the keys being indexed?
> If so: How?
>
> In B-trees all non-leaf nodes have a bunch of pointers to its child
> nodes. What is the size of such a pointer?
I doubt this is in the documentation, but you can always read the
source. I'd take a look around:
src/backend/access/nbtree/
starting, with the REAME file.
Michael Glaesemann
grzm seespotcode net