On Tue, Sep 10, 2024 at 05:56:47PM -0400, Tom Lane wrote: > Masahiko Sawada <sawada.m...@gmail.com> writes: > > On Tue, Sep 10, 2024 at 11:57 AM Tom Lane <t...@sss.pgh.pa.us> wrote: > >> Yeah, that seems like it could work. But are we sure that replicas > >> get a copy of the primary's control file rather than creating their > >> own? > > > Yes, I think so. Since at least the system identifiers of primary and > > replicas must be identical for physical replication, if replicas use > > their own control files then they cannot start the replication. > > Got it. So now I'm wondering if we need all the complexity of storing > stuff in the GIN metapages. Could we simply read the (primary's) > signedness out of pg_control and use that?
Yes.
