Re: eliminate xl_heap_visible to reduce WAL (and eventually set VM on-access)

From: Melanie Plageman <melanieplageman(at)gmail(dot)com>
To: Kirill Reshke <reshkekirill(at)gmail(dot)com>
Cc: Andres Freund <andres(at)anarazel(dot)de>, Robert Haas <robertmhaas(at)gmail(dot)com>, Andrey Borodin <x4mmm(at)yandex-team(dot)ru>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi>
Subject: Re: eliminate xl_heap_visible to reduce WAL (and eventually set VM on-access)
Date: 2025-11-20 17:19:58
Message-ID: CAAKRu_amF00f2T_H8N6pbbe75C22EeX1OqA=svpj8LNO1sdUuw@mail.gmail.com
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On Wed, Nov 19, 2025 at 6:13 PM Melanie Plageman
<melanieplageman(at)gmail(dot)com> wrote:
>
> Since it is passed into one of the helpers, I think I agree. Attached
> v21 has this change.

I've committed the first three patches. Attached v22 is the remaining
patches which set the VM in heap_page_prune_and_freeze() for vacuum
and then allow on-access pruning to also set the VM.

- Melanie

Attachment Content-Type Size
v22-0001-Split-heap_page_prune_and_freeze-into-helpers.patch text/x-patch 25.4 KB
v22-0002-Eliminate-XLOG_HEAP2_VISIBLE-from-vacuum-phase-I.patch text/x-patch 43.4 KB
v22-0003-Eliminate-XLOG_HEAP2_VISIBLE-from-empty-page-vac.patch text/x-patch 2.5 KB
v22-0004-Remove-XLOG_HEAP2_VISIBLE-entirely.patch text/x-patch 26.2 KB
v22-0005-Rename-GlobalVisTestIsRemovableXid-to-GlobalVisX.patch text/x-patch 8.0 KB
v22-0006-Use-GlobalVisState-in-vacuum-to-determine-page-l.patch text/x-patch 10.5 KB
v22-0007-Unset-all_visible-sooner-if-not-freezing.patch text/x-patch 2.4 KB
v22-0008-Allow-on-access-pruning-to-set-pages-all-visible.patch text/x-patch 37.7 KB
v22-0009-Set-pd_prune_xid-on-insert.patch text/x-patch 6.7 KB

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