On Sun, Mar 03, 2019 at 07:58:26AM +0100, Fabien COELHO wrote:
> I agree that having a server function (extension?) to do a full checksum
> verification, possibly bandwidth-controlled, would be a good thing. However
> it would have side effects, such as interfering deeply with the server page
> cache, which may or may not be desirable.
In what is that different from VACUUM or a sequential scan? It is
possible to use buffer ring replacement strategies in such cases using
the normal clock-sweep algorithm, so that scanning a range of pages
does not really impact Postgres shared buffer cache.
--
Michael