Re: pgsql: Teach autovacuum about multixact member wraparound. - Mailing list pgsql-committers

From Robert Haas
Subject Re: pgsql: Teach autovacuum about multixact member wraparound.
Date
Msg-id CA+TgmoZqASaap_OciTAV1+u8NNAu3toF=OHx7ExPa1eyEb8oxw@mail.gmail.com
Whole thread Raw
In response to Re: pgsql: Teach autovacuum about multixact member wraparound.  (Kevin Grittner <kgrittn@ymail.com>)
List pgsql-committers
On Fri, May 8, 2015 at 1:23 PM, Kevin Grittner <kgrittn@ymail.com> wrote:
> Robert Haas <rhaas@postgresql.org> wrote:
>
>> This patch leaves unsolved the problem of ensuring that emergency
>> autovacuums are triggered even when autovacuum=off.  We'll need
>> to fix that via a separate patch.
>
> I think we also need something like your previously-posted
>
> multixact-truncate-race.patch as a follow-on.  I'm not at all
> convinced that there is no possibility of truncating new data as
> things stand; and even if that is true now, it seems terribly
> fragile.  (Only mentioning it because it wasn't noted in the commit
> message.)

I agree.  I'm writing up a summary of open issues now.  I didn't
mention it in the commit message because it's not related to the
autovacuum part of the problem.

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company


pgsql-committers by date:

Previous
From: Andres Freund
Date:
Subject: pgsql: Minor ON CONFLICT related comments and doc fixes.
Next
From: Peter Eisentraut
Date:
Subject: pgsql: Fix whitespace