can't tell from this, but will existing Postgres databases at Heroku be automatically upgraded, or do you need to provision a new instance and migrate the data?
We figure reliability of your database as one of our chief missions. To that end, we prefer not to do anything which could even remotely be a possible cause of operational issues. Since changing over to a new version is easy, we tend to let users do so at their leisure. That said, in the event of a major 0-day we could be forced to migrate people, but it hasn't happened yet.
