| From: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Ondřej Světlík <osvetlik(at)flexibee(dot)eu>, pgsql-admin(at)postgresql(dot)org |
| Subject: | Re: Autovacuum of pg_database |
| Date: | 2016-05-10 20:15:28 |
| Message-ID: | 20160510201528.GA664314@alvherre.pgsql |
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| Lists: | pgsql-admin |
Tom Lane wrote:
> I'll bet they're all trying to do anti-wraparound vacuums. This would
> explain why the problem hasn't been observed often enough to have been
> fixed long since.
Ah, that should have been obvious, shouldn't it. I'm able to reproduce
the problem by moving relfrozenxid backwards for a shared catalog, and I
can confirm that it works correctly with the patch proposed, so I have
pushed it to all branches. (I only tested the problem scenario in 9.1
and master, since it's too much manual work).
Thanks for the report!
--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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