Horton

Re: Make COPY format extendable: Extract COPY TO format implementations

Junwang Zhao <zhjwpku@gmail.com>

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From: Junwang Zhao <zhjwpku@gmail.com>
To: Michael Paquier <michael@paquier.xyz>
Cc: Sutou Kouhei <kou@clear-code.com>, sawada.mshk@gmail.com, andrew@dunslane.net, nathandbossart@gmail.com, pgsql-hackers@postgresql.org
Date: 2024-02-01T04:20:11Z
Lists: pgsql-hackers 
On Thu, Feb 1, 2024 at 11:56 AM Michael Paquier <michael@paquier.xyz> wrote:
>
> On Thu, Feb 01, 2024 at 11:43:07AM +0800, Junwang Zhao wrote:
> > The first 6 rounds are like 10% better than the later 9 rounds, is this normal?
>
> Even with HEAD?  Perhaps you have some OS cache eviction in play here?
> FWIW, I'm not seeing any of that with longer runs after 7~ tries in a
> loop of 15.

Yeah, with HEAD. I'm on ubuntu 22.04, I did not change any gucs, maybe I should
set a higher shared_buffers? But I dought that's related ;(


> --
> Michael



-- 
Regards
Junwang Zhao

Commits

  1. Refactor Copy{From|To}GetRoutine() to use pass-by-reference argument.

  2. Refactor COPY FROM to use format callback functions.

  3. Refactor COPY TO to use format callback functions.

  4. Another try to fix BF failure introduced in commit ddd5f4f54a.

  5. Revert "Refactor CopyReadAttributes{CSV,Text}() to use a callback in COPY FROM"

  6. Improve COPY TO performance when server and client encodings match

  7. Simplify signature of CopyAttributeOutCSV() in copyto.c

  8. Revert "Refactor CopyAttributeOut{CSV,Text}() to use a callback in COPY TO"

  9. Refactor CopyAttributeOut{CSV,Text}() to use a callback in COPY TO

  10. Refactor CopyReadAttributes{CSV,Text}() to use a callback in COPY FROM

  11. Add progress reporting of skipped tuples during COPY FROM.

  12. pgbench: Add \syncpipeline

  13. meson: Make gzip and tar optional

  14. Export the external file reader used in COPY FROM as APIs.