On Fri, Jul 23, 2021 at 05:47:18PM -0700, Peter Geoghegan wrote:
> > I could perhaps see corruption happening if pg_control's oldest xid
> > value was closer to the current xid value than it should be, but I can't
> > see how having it 2-billion away could cause harm, unless perhaps
> > pg_upgrade itself used enough xids to cause the counter to wrap more
> > than 2^31 away from the oldest xid recorded in pg_control.
> >
> > What I am basically asking is how to document this and what it fixes.
>
> ISTM that this is a little like commits 78db307bb2 and a61daa14. Maybe
> take a look at those?
Agreed. I just wanted to make sure I wasn't missing an important aspect
of this patch. Thanks.
--
Bruce Momjian <bruce@momjian.us> https://momjian.us
EDB https://enterprisedb.com
If only the physical world exists, free will is an illusion.
