On Fri, 2009-12-04 at 07:54 -0500, Bruce Momjian wrote:
> > I should also point out that removing 4 bits from the tuple header would
> > allow us to get rid of t_infomask2, reducing tuple length by a further 2
> > bytes.
>
> Wow, that is a nice win. Does alignment allow us to actually use that
> space?
It would mean that tables up to 24 columns wide would still be 24 bytes
wide, whereas >8 columns now has to fit in 32 bytes. So in practical
terms most tables would benefit in your average database.
-- Simon Riggs www.2ndQuadrant.com