Thanks Murthy, that's exceptionally helpful!
Does anyone know what (in general) would cause the notices that Murthy spotted in the logs as per the snippet below?
> The postmaster is started and stopped on the backup server, so that any
> problems can be identified right away. (Notice the "ReadRecord: unexpected
> pageaddr 13C/98EDA000 in log file 317, segment 11, offset 15572992" in the
> later log. This seems to be a non-critical error; VACUUM ANALYZE gave a
> short series of:
> NOTICE: Rel <table name>: Uninitialized page 54300 - fixing
> ...
> VACUUM
> ).
