Re: doc: Mention clock synchronization recommendation for hot_standby_feedback

Jakub Wartak <jakub.wartak@enterprisedb.com>

From: Jakub Wartak <jakub.wartak@enterprisedb.com>
To: Amit Kapila <amit.kapila16@gmail.com>
Cc: PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Date: 2025-03-03T07:35:58Z
Lists: pgsql-hackers

Attachments

Hi Amit,

On Mon, Mar 3, 2025 at 6:26 AM Amit Kapila <amit.kapila16@gmail.com> wrote:
[..]

OK, sure.

> How about something like: "Note that if the clock on standby is moved
> ahead or backward, the feedback message may not be sent at the
> required interval. This can lead to prolonged risk of not removing
> dead rows on primary for extended periods as the feedback mechanism is
> based on timestamp."

Sure thing. I've just added '(..) In the extreme cases this can..' as
it is pretty rare to hit it. Patch attached.

-J.

Commits

  1. doc: Mention clock synchronization recommendation for hot_standby_feedback