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help / color / mirror / Atom feedFrom: Alvaro Herrera <alvherre@2ndquadrant.com>
To: jim_yates <pg@wg5jim.net>
Cc: pgsql-sql@postgresql.org
Subject: Re: could not access status of transaction pg_multixact issue
Date: Wed, 8 Oct 2014 17:54:16 -0300
Message-ID: <20141008205416.GZ7043@eldon.alvh.no-ip.org> (raw)
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jim_yates wrote:
> > A better way not involving mxid_age() would be to use pg_controldata to
> > extract the current value of the mxid counter, then subtract the current
> > relminmxid from that value.
>
>
> It's not clear which lines from pg_controldata to use for updating
> pg_database.datminmxid.
The one labelled NextMultiXactId.
> I also assume I would do the pg_database update on a idle database.
It doesn't matter, actually. pg_database is a shared catalog, so an
update would affect all the databases.
--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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To: pgsql-sql@postgresql.org
Cc: alvherre@2ndquadrant.com, pg@wg5jim.net
Subject: Re: could not access status of transaction pg_multixact issue
In-Reply-To: <20141008205416.GZ7043@eldon.alvh.no-ip.org>
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