> > Since lob's are typically large, the large overhead would
> be especially
> > painful, so a different relkind with another pagelayout
> seems adequate.
>
> No, I think a single Oid index on a relation, where only
> usually large tuples are stored is a very small overhead.
Well actually it will be one tuple per ~8k, so more than the
original tuple count, but I also meant the ~40 bytes per tuple
in the datapage.
But your arguments sound convincing :-)
Andreas