On Thu, Mar 18, 2010 at 2:50 AM, Tom Lane <t...@sss.pgh.pa.us> wrote:
> Jeff Davis <pg...@j-davis.com> writes: > > There are all kinds of challenges there, but it might be worth thinking > > about. Visibility information is highly compressible, and requires > > constant maintenance (updates, deletes, freezing, etc.). It also might > > make it possible to move to 64-bit xids, if we wanted to. > > If you want it to be cheaply updatable (or even cheaply readable), > compression is not what you're going to do. > > regards, tom lane > > +1..
