On Wed, 27 Nov 2024 at 22:06, Robert Haas <robertmh...@gmail.com> wrote: > If we had an upper bound on the size of shared_buffers
I think a fairly reliable upper bound is the amount of physical memory on the system at time of postmaster start. We could make it a GUC to set the upper bound for the rare cases where people do stuff like adding swap space later or doing online VM growth. We could even have the default be something like 4x the physical memory to accommodate those people by default. > reserve that amount of address space at startup time but only actually > map a portion of it Or is this the difficult part?
