I noticed that pg_verify_checksum takes an "-o oid" argument to only
check the relation with that OID; but that's wrong, because the number
is a relfilenode, not an OID (since it's compared to the on-disk file
name). I would suggest changing everything to clarify that it's a
pg_class.relfilenode value, otherwise it's going to be very confusing.
Maybe use "-f filenode" if -f is available?
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Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services