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Re: POC: make mxidoff 64 bits

Heikki Linnakangas <hlinnaka@iki.fi>

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From: Heikki Linnakangas <hlinnaka@iki.fi>
To: "Hayato Kuroda (Fujitsu)" <kuroda.hayato@fujitsu.com>, 'Maxim Orlov' <orlovmg@gmail.com>
Cc: Alexander Lakhin <exclusion@gmail.com>, Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>, Alvaro Herrera <alvherre@alvh.no-ip.org>, Alexander Korotkov <aekorotkov@gmail.com>, wenhui qiu <qiuwenhuifx@gmail.com>, Postgres hackers <pgsql-hackers@lists.postgresql.org>
Date: 2026-03-17T09:52:57Z
Lists: pgsql-hackers 
On 17/03/2026 04:56, Hayato Kuroda (Fujitsu) wrote:
> Hi hackers,
> 
> Thanks for working on the project.
> While running 007_multixact_conversion.pl with the meson build system, I found
> that delete_old_cluster.sh can be generated in the source tree.
> IIUC, we must expressly change the current directory under the tmp_check.
> 
> Please see attached to fix the issue.

Applied, thanks!

- Heikki

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. Fix partial read handling in pg_upgrade's multixact conversion

  2. Increase timeout in multixid_conversion upgrade test

  3. Improve sanity checks on multixid members length

  4. Clarify comment on multixid offset wraparound check

  5. Never store 0 as the nextMXact

  6. Add runtime checks for bogus multixact offsets

  7. Widen MultiXactOffset to 64 bits

  8. Move pg_multixact SLRU page format definitions to a separate header

  9. Convert confusing macros in multixact.c to static inline functions

  10. Index SLRUs by 64-bit integers rather than by 32-bit integers

  11. Cope with possible failure of the oldest MultiXact to exist.