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

From: Ranier Vilela <ranier(dot)vf(at)gmail(dot)com>
To: Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Cc: David Rowley <dgrowleyml(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Andres Freund <andres(at)anarazel(dot)de>, Julien Rouhaud <rjuju123(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Yura Sokolov <y(dot)sokolov(at)postgrespro(dot)ru>
Subject: Re: Reducing the chunk header sizes on all memory context types
Date: 2022-10-04 00:35:03
Message-ID: CAEudQArUWid1xmjSeUY2j01rBh2urmu_wgzbjxec90X0_P1dUA@mail.gmail.com
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On Thu, 29 Sept 2022 at 18:30, David Rowley <dgrowleyml(at)gmail(dot)com>
wrote:
> Does anyone have any opinions on this?
Hi,

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?

regards,
Ranier Vilela

Attachment Content-Type Size
001-reduces-memory-consumption.patch application/octet-stream 11.2 KB

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