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When you get an email from Heroku that reads:reads…

Your database xxx standard-0 (xxx on scihist-digicoll-production) must undergo maintenance

…. here’s how to do the maintenance at a time of your choosing:

1. Schedule 10 minutes of downtime

2. Put the following in a bash script:Disable our hirefire autoscaling to keep it from starting workers back up again: turn off the switch next to “MANAGER” at https://manager.hirefire.io/managers/2533bb0e-4eda-4f45-b8ef-3235c1e302df

3. Set worker dyno count to zero at https://dashboard.heroku.com/apps/scihist-digicoll-production/resources

4. Run the following (best done by running a bash script)

   1. heroku maintenance:on --app scihist-digicoll-production heroku pg:maintenance:run --force --app scihist-digicoll-production heroku pg:wait --app scihist-digicoll-production heroku maintenance:off --app scihist-digicoll-production

5. Scale down workers to zero at https://dashboard.heroku.com/apps/scihist-digicoll-production/resources

6. Disable our hirefire autoscaling to keep it from starting workers back up again

   1. https://manager.hirefire.io/managers/2533bb0e-4eda-4f45-b8ef-3235c1e302df/update

7. At the appointed time, run the script.

8. Restore hirefire and heroku stateRestore Heroku worker dyno type and count

9. Turn the Hirefire manager back on.