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Created September 10, 2020 23:26
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How to upgrade a Heroku PostgreSQL database to a new plan
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how-to-upgrade-heroku-postgresql.md

How to upgrade a Heroku PostgreSQL database to a new plan

I started a project on a Hobby Dev plan (free, limit 10,000 rows), and then later needed to upgrade it to Hobby Basic ($9/month, limit 10,000,000 rows).

After assigning the new database, I had two databases attached to the application. They looked something like this:

  • HEROKU_POSTGRESQL_OLIVE (postgresql-dimensional-3321) Old, free-tier (Hobby Dev) database
  • HEROKU_POSTGRESQL_COPPER (postgresql-perpendicular-6628) New Hobby Basic, $9/month database

Here's how I ran the upgrade:

heroku maintenance:on
heroku pg:copy DATABASE_URL HEROKU_POSTGRESQL_COPPER_URL
heroku pg:promote HEROKU_POSTGRESQL_COPPER
heroku maintenance:off

The pg:promote command set the DATABASE_URL environment variable to the new database.

More instructions: https://devcenter.heroku.com/articles/upgrading-heroku-postgres-databases#upgrade-with-pg-copy-default

Setting up backups

I set up nightly backups of the database using the following command:

heroku pg:backups schedule DATABASE_URL --at '02:00 America/Los_Angeles'

To list available backus, use:

heroku pg:backups

To fetch the most recent backup and restore it into a local Postgres:

curl -o latest.dump `heroku pg:backups public-url`
createdb mynewdb
pg_restore --verbose --clean --no-acl --no-owner \
    -h localhost -U simonw -d mynewdb latest.dump
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