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From: Maxim Orlov <orlovmg@gmail.com>
Date: Mon, 1 Dec 2025 11:53:41 +0300
Message-ID: 
 <CACG=ezZ1LbA1G+4mQFuDCUbSHdPR3AEzG+frBm_TCQh8-wC8Ng@mail.gmail.com>
Subject: Re: POC: make mxidoff 64 bits
To: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>
Cc: Heikki Linnakangas <hlinnaka@iki.fi>,
 Alvaro Herrera <alvherre@alvh.no-ip.org>,
	Alexander Korotkov <aekorotkov@gmail.com>,
 wenhui qiu <qiuwenhuifx@gmail.com>,
	Postgres hackers <pgsql-hackers@lists.postgresql.org>
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On Fri, 28 Nov 2025 at 16:17, Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>
wrote:

> One more thing,
> An UPDATE waits for FOR SHARE query to finish, and vice versa. In my
> experiments I didn't see an UPDATE creating a multi-xact. Why do we
> have UPDATEs in the load created by the test? Am I missing something?


As far as I remember, this was done on purpose to create different
multixact members statuses randomly.


-- 
Best regards,
Maxim Orlov.

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<div dir=3D"ltr"><div dir=3D"ltr"><br></div><br><div class=3D"gmail_quote g=
mail_quote_container"><div dir=3D"ltr" class=3D"gmail_attr">On Fri, 28 Nov =
2025 at 16:17, Ashutosh Bapat &lt;<a href=3D"mailto:ashutosh.bapat.oss@gmai=
l.com">ashutosh.bapat.oss@gmail.com</a>&gt; wrote:<br></div><blockquote cla=
ss=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid =
rgb(204,204,204);padding-left:1ex">
One more thing,<br>
An UPDATE waits for FOR SHARE query to finish, and vice versa. In my<br>
experiments I didn&#39;t see an UPDATE creating a multi-xact. Why do we<br>
have UPDATEs in the load created by the test? Am I missing something?</bloc=
kquote><div>=C2=A0</div><div><span class=3D"gmail-HwtZe" lang=3D"en"><span =
class=3D"gmail-jCAhz gmail-ChMk0b"><span class=3D"gmail-ryNqvb">As far as I=
 remember, this was done on purpose to create=C2=A0</span></span></span>dif=
ferent</div><div>multixact=C2=A0members statuses randomly.</div></div><div>=
<br clear=3D"all"></div><br><span class=3D"gmail_signature_prefix">-- </spa=
n><br><div dir=3D"ltr" class=3D"gmail_signature"><div dir=3D"ltr"><div>Best=
 regards,<br></div><div>Maxim Orlov.</div></div></div></div>

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