Tatsuo Ishii <t-ishii(at)sra(dot)co(dot)jp> writes:
> Also I am worried about the performance of the per table Oid
> generators.
I think performance would be a big problem if we tried to implement them
just like sequences are done now. But a shared hashtable of Oid
generators (each one handled roughly like the single Oid generator
currently is) would probably work okay. We'd have to work out how to
have a backing disk table for this hashtable, since we couldn't expect
to have room in shared memory for all generators at all times --- but we
could cache all the active generators in shared memory, I'd think.
regards, tom lane