> Users should plan to apply this update at the next scheduled downtime.<p>Folks who are looking for ways to upgrade PostgreSQL without downtime might want to take a look at this setup using pacemaker: <a href="https://github.com/gocardless/our-postgresql-setup" rel="nofollow">https://github.com/gocardless/our-postgresql-setup</a><p><a href="http://www.interdb.jp/blog/pgsql/pg_pacemaker_01/" rel="nofollow">http://www.interdb.jp/blog/pgsql/pg_pacemaker_01/</a> digs into playing with the vagrant box a tiny bit.<p>EDIT-- ah, found the talk explaining it: <a href="https://www.youtube.com/watch?v=SAkNBiZzEX8" rel="nofollow">https://www.youtube.com/watch?v=SAkNBiZzEX8</a>