Re: pg_controldata/pg_resetxlog "Latest checkpoint's NextXID" format

On 12/29/2015 07:15 AM, Tom Lane wrote:
> Yeah.  Use of the same x/y notation with two different bases seems like
> a recipe for confusion.  It's probably too late to do anything about
> this for 9.5, but I'd be +1 for adopting Jose's suggestion or some
> other formatting tweak in HEAD.

I made the "%u/%u" -> "%u:%u" change in the controldata patch I just
posted, but I suppose I should commit that separately. Any complaints
about that?

http://www.postgresql.org/docs/devel/static/functions-info.html
"Table 9-63. Transaction IDs and Snapshots"
"The internal transaction ID type (xid) is 32 bits wide and wraps around every 4 billion transactions. However, these functions export a 64-bit format that is extended with an "epoch" counter so it will not wrap around during the life of an installation."