Re: old_snapshot_threshold bottleneck on replica - Mailing list pgsql-hackers

On Tue, Sep 5, 2023 at 12:58 AM Thomas Munro <thomas.munro@gmail.com> wrote:
> I hope we get "snapshot too old" back one day.

Thanks for working on this. Though I wonder why you didn't do
something closer to a straight revert of the feature. Why is nbtree
still passing around snapshots needlessly?

Also, why are there still many comments referencing the feature?
There's the one above should_attempt_truncation(), for example.
Another appears above init_toast_snapshot(). Are these just
oversights, or was it deliberate? You said something about retaining
vestiges.

--
Peter Geoghegan