Short row header

[PFC <lists@xxxxxxxxxx>]

	I have this "poll results" table with just 3 integer fields, which is  
never updated, only inserted/deleted...
	Did the Devs consider an option to have VACUUM reduce the row header  
sizes for tuples that are long commited and are currently visible to all  
transactions ? (even if this makes the tuples non-updateable, as long as  
they can be deleted, it would be OK for this type of tables).