Re: Reducing the chunk header sizes on all memory context types

Em ter., 4 de out. de 2022 às 08:29, Ranier Vilela <ranier(dot)vf(at)gmail(dot)com>
escreveu:

> Em ter., 4 de out. de 2022 às 05:36, David Rowley <dgrowleyml(at)gmail(dot)com>
> escreveu:
>
>> On Tue, 4 Oct 2022 at 13:35, Ranier Vilela <ranier(dot)vf(at)gmail(dot)com> wrote:
>> > Revisiting my work on reducing memory consumption, I found this patch
>> left out.
>> > I'm not sure I can help.
>> > But basically I was able to write and read the block size, in the chunk.
>> > Could it be the case of writing and reading the context pointer in the
>> same way?
>> > Sure this leads to some performance loss, but would it make it possible
>> to get the context pointer from the chunk?
>> > In other words, would it be possible to save the context pointer and
>> compare it later in MemoryContextContains?
>>
>> I'm not really sure I understand the intention of the patch. The
>> header size for all our memory contexts was already reduced in
>> c6e0fe1f2. The patch you sent seems to pre-date that commit.
>>
> There is zero intention to commit this. It's just an experiment I did.
>
> As it is in the patch, it is possible to save the context pointer outside
> the header chunk.
> Making it possible to retrieve it in MemoryContextContains.
>
Never mind, it's a waste of time.

regards,
Ranier Vilela