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

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.

It's just an idea.

regards,
Ranier Vilela