On Thu, 27 May 2004 16:50:24 -0400, Alvaro Herrera
<alvherre@dcc.uchile.cl> wrote:
>Now you are on the subject, can I ask you to take a peek at what I did
>regarding tuple headers?
I did read your patch, but I didn't understand it. :-(
>At first I thought I'd have to add back Xmax as a field on its own
Veto! This would increase heap tuple header size ==> less tuples per
page ==> more pages per table ==> more I/O ==> performance loss.
> is there a situation
>on which we should need to peek at Cmin after setting Xmax for a
>particusar tuple?
http://archives.postgresql.org/pgsql-hackers/2002-05/msg00090.php
ServusManfred