Horton

Re: recovering from "found xmin ... from before relfrozenxid ..."

Magnus Hagander <magnus@hagander.net>

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From: Magnus Hagander <magnus@hagander.net>
To: Robert Haas <robertmhaas@gmail.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, Andres Freund <andres@anarazel.de>, "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>
Date: 2020-07-14T14:21:11Z
Lists: pgsql-hackers 
On Tue, Jul 14, 2020 at 4:09 PM Robert Haas <robertmhaas@gmail.com> wrote:

> On Tue, Jul 14, 2020 at 8:25 AM Magnus Hagander <magnus@hagander.net>
> wrote:
> > I don't think that it necessarily has to be. As long as we're talking
> about adding something and not actually changing their existing packages,
> getting this into both yum and apt shouldn't be *that* hard, if it's
> coordinated well with Christoph and Devrim (obviously that's based on my
> experience and they will have to give a more complete answer themselves).
> It would be a lot more complicated if it involved changing an existing
> package.
>
> I mean, you presumably could not move pg_resetwal to this new package
> in existing branches, right?
>

Probably and eventually. But that can be done for 14+ (or 13+ depending on
how "done" the packaging is there -- we should just make sure that hits the
biggest platform in the same release).

-- 
 Magnus Hagander
 Me: https://www.hagander.net/ <http://www.hagander.net/>
 Work: https://www.redpill-linpro.com/ <http://www.redpill-linpro.com/>

Commits

  1. Fix wrong data table horizon computation during backend startup.

  2. Centralize horizon determination for temp tables, fixing bug due to skew.

  3. pg_surgery: Try to stabilize regression tests.

  4. New contrib module, pg_surgery, with heap surgery functions.

  5. Set cutoff xmin more aggressively when vacuuming a temporary table.

  6. snapshot scalability: Don't compute global horizons while building snapshots.

  7. Introduce vacuum errcontext to display additional information.