Re: Overhauling "Routine Vacuuming" docs, particularly its handling of freezing

On Mon, May 1, 2023 at 9:08 AM Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> I disagree. If you start the cluster in single-user mode, you can
> actually wrap it around, unless something has changed that I don't
> know about.

This patch relies on John's other patch which strongly discourages the
use of single-user mode. Were it not for that, I might agree.

> I'm not trying to debate the details of the patch, which I have not
> read. I am saying that, while wraparound is perhaps not a perfect term
> for what's happening, it is not, in my opinion, a bad term either. I
> don't think it's accurate to imagine that this is a 64-bit counter
> where we only store 32 bits on disk. We're trying to retcon that into
> being true, but we'd have to work significantly harder to actually
> make it true.

The purpose of this documentation section is to give users practical
guidance, obviously. The main reason to frame it this way is because
it seems to make the material easier to understand.

--
Peter Geoghegan