On Fri, Jul 17, 1998 at 01:00:10PM +0800, Vadim Mikheev wrote:
> In original postgres there was dedicated vacuum process...
> Vacuuming without human administration is possible but
> in any case commit in non-overwriting system requires
> ~2 data block writes (first - to write changes, second - to
> write updated xmin/xmax statuses). In WAL systems only
> 1 data block write required...
Then the arguments are clearly in favor of WAL.
> Oracle is WAL and multi-version system!
While Oracle has some faults (or more) I agree with that choice.
> We could implement multi-version control now and switch
> to WAL latter...
Once again I fully agree.
> I personally very like multi-versions...
Me too.
Michael
--
Dr. Michael Meskes meskes@online-club.de, meskes@debian.org
Go SF49ers! Go Rhein Fire! Use Debian GNU/Linux!