"Andrew Bartley" <abartley(at)evolvosystems(dot)com> writes:
> This error pops up every few days during clustering
> ERROR: Cannot insert a duplicate key into unique index pg_class_oid_index
Hmm, is it possible that your OID counter has wrapped around? Try
creating a new table, and then look to see if its OID is the largest one
in pg_class or not.
regards, tom lane