Hi,
I think emitting DBState (staring up, shut down, shut down in
recovery, shutting down, in crash recovery, in archive recovery, in
production) via the pg_control_system function would help know the
database state, especially during PITR/archive recovery. During
archive recovery, the server can open up for read-only connections
even before the archive recovery finishes. Having, pg_control_system
emit database state would help the users/service layers know it and so
they can take some actions based on it.
Attaching a patch herewith.
Thoughts?
Regards,
Bharath Rupireddy.
