| From: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Simon Riggs <simon(at)2ndquadrant(dot)com>, pgsql-committers <pgsql-committers(at)postgresql(dot)org> |
| Subject: | Re: pgsql: Avoid archiving XLOG_RUNNING_XACTS on idle server |
| Date: | 2016-04-04 06:31:46 |
| Message-ID: | CANP8+jKoFKXvCZeNUG=TaCtg_YCZp-PDMffO86PG8h=wyF3R0g@mail.gmail.com |
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| Lists: | pgsql-committers pgsql-hackers |
On 4 April 2016 at 07:24, Andres Freund <andres(at)anarazel(dot)de> wrote:
> On 2016-04-04 06:19:04 +0000, Simon Riggs wrote:
> > Avoid archiving XLOG_RUNNING_XACTS on idle server
> >
> > If archive_timeout > 0 we should avoid logging XLOG_RUNNING_XACTS if
> idle.
> >
> > Bug 13685 reported by Laurence Rowe, investigated in detail by Michael
> Paquier,
> > though this is not his proposed fix.
> > 20151016203031(dot)3019(dot)72930(at)wrigleys(dot)postgresql(dot)org
> >
> > Simple non-invasive patch to allow later backpatch to 9.4 and 9.5
>
> Uh. This is wrong.
For one it breaks cleanup with logical decoding which
> does *NEED* to know that nothing is happening. Although only once, not
> repeatedly.
>
If the patch did that, I agree it would be wrong. It doesn't, deliberately.
--
Simon Riggs http://www.2ndQuadrant.com/
<http://www.2ndquadrant.com/>
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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