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

On Mon, Jun 23, 2025 at 4:25 PM Melanie Plageman
<melanieplageman@gmail.com> wrote:
>
> The attached patch set eliminates xl_heap_visible, the WAL record
> emitted when a block of the heap is set all-visible/frozen in the
> visibility map. Instead, it includes the information needed to update
> the VM in the WAL record already emitted by the operation modifying
> the heap page.

Rebased in light of recent changes on master:

0001: cleanup
0002: preparatory work
0003: eliminate xl_heap_visible for COPY FREEZE
0004 - 0005: eliminate xl_heap_visible for vacuum's phase III
0006: eliminate xl_heap_visible for vacuum phase I empty pages
0007 - 0010: preparatory refactoring
0011: eliminate xl_heap_visible from vacuum phase I prune/freeze
0012: remove xl_heap_visible

- Melanie