On Mon, Oct 16, 2023 at 05:48:43PM +0200, Laurenz Albe wrote:
> I don't have strong feelings either way. If you have backup_label
> but no signal file, starting PostgreSQL may succeed (if the WAL
> with the checkpoint happens to be in pg_wal) or it may fail with
> an error message. There is no danger of causing damage unless you
> remove backup_label, right?
A bit more happens currently if you have a backup_label with no signal
files, unfortunately, because this causes some startup states to not
be initialized. See around here:
https://www.postgresql.org/message-id/Y/Q/17rpYS7YGbIt@paquier.xyz
https://www.postgresql.org/message-id/Y/v0c+3W89NBT/if@paquier.xyz
> I cannot think of a use case where you use such a configuration on
> purpose, and the current error message is more crypric than a plain
> "you must have a signal file to start from a backup", so perhaps
> your patch is a good idea.
I hope so.
--
Michael