Re: Extending varlena

Simon Riggs <simon@2ndQuadrant.com> writes:
> Probably also using a separate Sequence to allocate numbers rather than
> using up all the Oids on LOs would be a good plan.

Well, assuming that your Large Objects are actually Large, you aren't
going to need as many OIDs as all that ;-)

However: I was chewing on this point a few days ago, and it seemed to me
that essentially duplicating the functionality of the OID generator
wasn't likely to be a win.  What seems more practical is to extend the
internal next-OID counter to 64 bits, and allow callers to get either
the full 64 bits or just the lowest 32 bits depending on what they need.
This change would actually be entirely transparent to 32-bit callers,
and the extra cycles to manage a 64-bit counter would surely be lost in
the noise compared to acquiring/releasing OidGenLock.
        regards, tom lane