Robert Haas wrote:
> On Thu, Nov 20, 2014 at 3:44 PM, Josh Berkus <josh@agliodbs.com> wrote:
> >> So that we can have two ways to lose data?
> >>
> >> Forbidding connections to a database doesn't prevent XID or MXID wraparound.
> >
> > It does prevent the user from doing anything about it, though, since
> > they can't manually vacuum template0 without knowing unpublished hackery.
>
> True. I don't know what to do about that. Do you?
Maybe tweak autovacuum so that it vacuum-freezes the non-connectable
template databases when they are multixact_freeze_min_age old -- or
something similar. That would cause the multixact age to go down to
zero for those databases with enough frequency.
--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
