On 2021-Apr-19, Robert Haas wrote:
> Another possible approach would be to accept connections for
> monitoring purposes even during crash recovery. We can't allow access
> to any database at that point, since the system might not be
> consistent, but we could allow something like a replication connection
> (the non-database-associated variant).
Hmm. We already have pg_isready, which is pretty simplistic -- it tries
to connect to the server and derive a status in a very simplistic way.
Can we perhaps improve on that? I think your idea of using the
non-database-connected replication mode would let the server return a
tuple with some status information with a new command. And then
pg_isready could interpret that, or just print it.
--
Álvaro Herrera 39°49'30"S 73°17'W
Subversion to GIT: the shortest path to happiness I've ever heard of
(Alexey Klyukin)
