| From: | Bruce Momjian <bruce(at)momjian(dot)us> |
|---|---|
| To: | Peter Geoghegan <pg(at)bowt(dot)ie> |
| Cc: | Floris Van Nee <florisvannee(at)optiver(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: visibility map corruption |
| Date: | 2021-07-06 17:58:08 |
| Message-ID: | 20210706175808.GC26994@momjian.us |
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| Lists: | pgsql-hackers |
On Tue, Jul 6, 2021 at 10:32:24AM -0700, Peter Geoghegan wrote:
> On Tue, Jul 6, 2021 at 10:27 AM Bruce Momjian <bruce(at)momjian(dot)us> wrote:
> > OK, this is confirmation that the pg_resetwal bug, and its use by
> > pg_upgrade, is a serious issue that needs to be addressed. I am
> > prepared to work on it now.
>
> To be clear, I'm not 100% sure that this is related to the pg_upgrade
> + "pg_resetwal sets oldestXid to an invented value" issue. I am sure
> that that is a serious issue that needs to be addressed sooner rather
> than later, though.
Well, pg_upgrade corruptions are rare, but so is modifying
autovacuum_freeze_max_age. If we have a corruption and we know
autovacuum_freeze_max_age was modified, odds are that is the cause.
--
Bruce Momjian <bruce(at)momjian(dot)us> https://momjian.us
EDB https://enterprisedb.com
If only the physical world exists, free will is an illusion.
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