Re: Re: [COMMITTERS] pgsql: Invent a memory context reset/delete callback mechanism.

Jeff Davis <pgsql@j-davis.com> writes:
> On Fri, 2015-02-27 at 22:17 +0000, Tom Lane wrote:
>> In passing, per discussion, rearrange some boolean fields in struct
>> MemoryContextData so as to avoid wasted padding space.  For safety,
>> this requires making allowInCritSection's existence unconditional;
>> but I think that's a better approach than what was there anyway.

> I notice that this uses the bytes in MemoryContextData that I was hoping
> to use for the memory accounting patch (for memory-bounded HashAgg).

Meh.  I thought Andres' complaint about that was unfounded anyway ;-).
But I don't really see why a memory accounting patch should be expected to
have zero footprint.
        regards, tom lane