On 9/10/07, Florian Pflug <fgp.phlo.org@gmail.com> wrote:
Maybe that risk could be lowered if instead of a flag, we stored the
minimal global xmin needed to prune at least one tuple.
I like the idea. The question is whether the chances of a Prunable
page being looked up again and again in presence of a long
running transaction are high enough to justify adding 4 bytes
to page header.
Thanks,
Pavan
--
Pavan Deolasee
EnterpriseDB
http://www.enterprisedb.com