Simon Riggs <simon@2ndQuadrant.com> writes:
> As I pointed out here
> http://archives.postgresql.org/pgsql-hackers/2009-12/msg00056.php
> we only need to use 3 bits not 4, but it does limit tuple length to 4096
> for all block sizes. (Two different options there for doing that).
Limiting the tuple length is a deal-breaker.
regards, tom lane