Re: Global snapshots

From: Dmitry Dolgov <9erthalion6(at)gmail(dot)com>
To: a(dot)sher(at)postgrespro(dot)ru
Cc: x4mmm(at)yandex-team(dot)ru, Stas Kelvich <s(dot)kelvich(at)postgrespro(dot)ru>, Robert Haas <robertmhaas(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Global snapshots
Date: 2018-11-29 15:21:21
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> On Wed, Jul 25, 2018 at 1:35 PM Arseny Sher <a(dot)sher(at)postgrespro(dot)ru> wrote:
> Hello,
> I have looked through the patches and found them pretty accurate. I'd
> fixed a lot of small issues here and there; updated patchset is
> attached.


Thank you for working on this patch. Unfortunately, the patch has some
conflicts, could you please rebase it? Also I wonder if you or Stas can shed
some light about this:

> On Wed, May 16, 2018 at 2:02 PM Stas Kelvich <s(dot)kelvich(at)postgrespro(dot)ru> wrote:
> > On 15 May 2018, at 15:53, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> >
> > I guess it seems to me that you
> > have some further research to do along the lines you've described:
> >
> > 1. Can we hold back xmin only when necessary and to the extent
> > necessary instead of all the time?
> > 2. Can we use something like an STO analog, maybe as an optional
> > feature, rather than actually holding back xmin?
> Yes, to both questions. I'll implement that and share results.

Is there any resulting patch where the ideas how to implement this are outlined?

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