| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, Maxim Orlov <orlovmg(at)gmail(dot)com>, Yura Sokolov <y(dot)sokolov(at)postgrespro(dot)ru>, Evgeny Voropaev <evgeny(dot)voropaev(at)tantorlabs(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>, Andrey Borodin <x4mmm(at)yandex-team(dot)ru> |
| Subject: | Re: Add 64-bit XIDs into PostgreSQL 15 |
| Date: | 2026-02-09 13:40:48 |
| Message-ID: | CA+TgmoZuxbWe+dMo4XDXL1w+S2Nxbc7dfaYOSZKXJR-xj_+MdA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Sun, Feb 8, 2026 at 12:21 PM Andres Freund <andres(at)anarazel(dot)de> wrote:
> On the topic of pd_prune_xid - I've been wondering if, instead of the double
> xmax approach, the high bits of the 64bit xid could be stored in pd_prune_xid,
> signified by a flag on the page indicating so.
We potentially have both XIDs and MXIDs to worry about, though.
--
Robert Haas
EDB: http://www.enterprisedb.com
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