On Wed, 3 Mar 2021 at 01:12, Magnus Hagander <mag...@hagander.net> wrote: > > On Tue, Mar 2, 2021 at 7:52 AM David Rowley <dgrowle...@gmail.com> wrote: > > I have seen it happen that an instance has a vacuum_cost_limit set and > > someone did start the database in single-user mode, per the advice of > > the error message only to find that the VACUUM took a very long time > > due to the restrictive cost limit. I struggle to imagine why anyone > > wouldn't want the vacuum to run as quickly as possible in that > > situation. > > Multiple instances running on the same hardware and only one of them > being in trouble?
You might be right. I'm not saying it's a great idea but thought it was worth considering. We could turn to POLA and ask; what would you be more surprised at; 1) Your database suddenly using more I/O than it had been previously, or; 2) Your database no longer accepting DML. David
