"Jonathan S. Katz" <jkatz@postgresql.org> writes:
> I did rule out wanting to do the "xid + $X" check after reviewing some
> of the output. I think that both $X could end up varying, and it really
> feels like a bandaid.
It is that. I wouldn't feel comfortable with $X less than 100 or so,
which is probably sloppy enough to draw Robert's ire. Still, realizing
that what we want right now is a band-aid for 15beta3, I don't think
it's an unreasonable short-term option.
> Andres suggested upthread using "txid_current()" -- for the comparison,
> that's one thing I looked at. Would any of the XID info from
> "pg_control_checkpoint()" also serve for this test?
I like the idea of txid_current(), but we have no comparable
function for mxid do we? While you could get both numbers from
pg_control_checkpoint(), I doubt that's sufficiently up-to-date.
regards, tom lane
