Re: refactoring relation extension and BufferAlloc(), faster COPY

Hi,

On 2023-03-29 20:02:33 -0700, Andres Freund wrote:
> Attached is v6. Changes:

Attached is v7. Not much in the way of changes:
- polished a lot of the commit messages
- reordered commits to not be blocked as immediately by
  https://www.postgresql.org/message-id/20230325025740.wzvchp2kromw4zqz%40awork3.anarazel.de
- Used the new relation extension function in two more places (finding an
  independent bug on the way), not sure why I didn't convert those earlier...

I'm planning to push the patches up to the hio.c changes soon, unless somebody
would like me to hold off.

After that I'm planning to wait for a buildfarm cycle, and push the changes
necessary to use bulk extension in hio.c (the main win).

I might split the patch to use ExtendBufferedRelTo() into two, one for
vm_extend() and fsm_extend(), and one for xlogutils.c. The latter is more
complicated and has more of a complicated history (see [1]).

Greetings,

Andres Freund


https://www.postgresql.org/message-id/20230223010147.32oir7sb66slqnjk%40awork3.anarazel.de