Lucas <lucas75@gmail.com> writes:
> In the company I work for, some clusters reached the OID limit (2^32) and
> we had to reinstall the cluster.
Uh ... why did you think you needed to do that? The OID counter
will wrap around and things should carry on fine. There are defenses
to prevent creation of duplicate OID values within any one catalog
or TOAST table, and it doesn't particularly matter if there are
duplicates across tables.
regards, tom lane