Andres Freund <andres(at)2ndquadrant(dot)com> writes:
> On 2014-04-26 05:40:21 -0700, David Fetter wrote:
>> Out of curiosity, where are you finding that a 32-bit integer is
>> causing problems that a 16-bit one would solve?
> Save space? For one it allows to shrink some structs (into one
> cacheline!).
And next week when we need some other field in a buffer header,
what's going to happen? If things are so tight that we need to
shave a few bits off backend IDs, the whole thing is a house of
cards anyway.
regards, tom lane