Message-ID: <2d9282d3-7f24-4e1c-af5f-cd33316dead7@iki.fi>
Date: Fri, 12 Dec 2025 10:51:25 +0200
MIME-Version: 1.0
User-Agent: Mozilla Thunderbird
Subject: Re: POC: make mxidoff 64 bits
To: Alvaro Herrera <alvherre@alvh.no-ip.org>
Cc: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>,
 Maxim Orlov <orlovmg@gmail.com>, Alexander Korotkov <aekorotkov@gmail.com>,
 wenhui qiu <qiuwenhuifx@gmail.com>,
 Postgres hackers <pgsql-hackers@lists.postgresql.org>
References: <202512110804.hmukvd7jna34@alvherre.pgsql>
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From: Heikki Linnakangas <hlinnaka@iki.fi>
In-Reply-To: <202512110804.hmukvd7jna34@alvherre.pgsql>
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On 11/12/2025 22:05, Alvaro Herrera wrote:
> On 2025-Dec-11, Heikki Linnakangas wrote:
> 
>> That's a great question and I've been wondering about it myself. It goes all
>> the way to the initial commit where multixacts were introduced, and I don't
>> see any particular reason for it even back then. Even in the very first
>> version of multixact.c, IMO it would've been simpler to have the writer
>> handle the wraparound.
>>
>> Álvaro, would you happen to remember?
> 
> Sorry, I have no recollections of the reason why it was done this way.

Ok, I have pushed this. Thanks!

- Heikki