On Fri, Jun 26, 2020 at 10:11:41AM +0530, Amul Sul wrote: > I think that's expected since the server isn't clean shutdown, similar error > can > be seen with any server which has been shutdown in immediate mode > (pg_clt -D data_dir -m i).
Any operation working on on-disk relation blocks needs to have a consistent state, and a clean shutdown gives this guarantee thanks to the shutdown checkpoint (see also pg_rewind). There are two states in the control file, shutdown for a primary and shutdown while in recovery to cover that. So if you stop the server cleanly but fail to see a proper state with pg_checksums, it seems to me that the proposed patch does not handle correctly the state of the cluster in the control file at shutdown. That's not good. -- Michael
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