Tomas Vondra <tv(at)fuzzy(dot)cz> writes:
> I believe this should check parent->track_mem, just like
> update_allocation, because this way it walks all the parent context up
> to the TopMemoryContext.
TBH, I don't think this "opt-in tracking" business has been thought
through even a little bit; for example, what happens if there is a
declared-to-not-track context in between levels that are declared
to track? And it certainly has not been proven that the extra
complexity actually saves cycles rather than the reverse.
regards, tom lane