On Fri, Aug 20, 2021 at 9:03 AM Robert Haas <robertmh...@gmail.com> wrote: > That could be the right decision, but nothing said up to this point > really seems to suggest it. The open/closed distinction and the > changes in how to bin available space could all be done with the > present model.
I guess that's true. Isn't this just semantics, though? The new FSM implementation certainly cannot forget about pages that it deems open, or fail to have information about pages that should be considered open -- that would be absolutely unacceptable. And the implementation cannot assume that it won't have to maintain information about every single heap page. All I'm saying is that in practice this will be very rare. Making the FSM structure smaller isn't really the goal, though. -- Peter Geoghegan
