Robert Haas <robertmhaas@gmail.com> writes:
> This approach seems good to me, and the performance results look very
> positive. The nice thing about this is that there is not a
> user-configurable knob; the system automatically determines when
> larger extensions are needed, which will mean that real-world users
> are much more likely to benefit from this. I don't think it matters
> that this is a little faster or slower than an approach with a manual
> knob; what matter is that it is a huge improvement over unpatched
> master, and that it does not need a knob. The arbitrary constant of
> 10 is a little unsettling but I think we can live with it.
+1. "No knob" is a huge win.
regards, tom lane