Re: 64-bit MultiXactOffset vs. 9.3->9.4 upgrade, pg_resetwal, "wraparound" msg

From: Heikki Linnakangas <hlinnaka(at)iki(dot)fi>
To: Noah Misch <noah(at)leadboat(dot)com>, orlovmg(at)gmail(dot)com
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: 64-bit MultiXactOffset vs. 9.3->9.4 upgrade, pg_resetwal, "wraparound" msg
Date: 2026-09-30 12:45:56
Message-ID: 0d2a9270-3ce8-4ee8-bd39-ecaa81a13210@iki.fi
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On 16/09/2026 19:49, Heikki Linnakangas wrote:
> On 28/08/2026 02:17, Noah Misch wrote:
>> Others are more optional or already reported.  In particular, two other
>> findings were already reported and apparently fixed after the Opus
>> run, in
>> thread "pg_upgrade silently truncates nextMultiOffset to 32 bits":
>> https://www.postgresql.org/message-id/
>> CAD21AoCvzerscfU8o4ARQ793yAGHpQ72r2x5apeC_W2-k%3DSLCQ%40mail.gmail.com
>
> For the documentation issues, I propose the attached.

I committed this with minor rewording, and some related comment fixes
(commit b69356cd78). With that, all the issues from this thread have
been addressed; I'll mark the Open Item as resolved.

- Heikki

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