| From: | Steve Singer <steve(at)ssinger(dot)info> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Petr Jelinek <petr(at)2ndquadrant(dot)com> |
| Cc: | Simon Riggs <simon(at)2ndQuadrant(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Andres Freund <andres(at)2ndquadrant(dot)com>, Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Anssi Kääriäinen <anssi(dot)kaariainen(at)thl(dot)fi>, Heikki Linnakangas <hlinnakangas(at)vmware(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>, Jaime Casanova <jaime(at)2ndquadrant(dot)com> |
| Subject: | Re: tracking commit timestamps |
| Date: | 2014-11-19 16:30:09 |
| Message-ID: | BLU436-SMTP232C315DF42FEC4A945678FDC890@phx.gbl |
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| Lists: | pgsql-hackers pgsql-www |
On 11/19/2014 08:22 AM, Alvaro Herrera wrote:
>
> I think we're overblowing the pg_upgrade issue. Surely we don't need to
> preserve commit_ts data when upgrading across major versions; and
> pg_upgrade is perfectly prepared to remove old data when upgrading
> (actually it just doesn't copy it; consider pg_subtrans or pg_serial,
> for instance.) If we need to change binary representation in a future
> major release, we can do so without any trouble.
>
That sounds reasonable. I am okay with Petr removing the LSN portion
this patch.
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