A rollback the database does not follow
Make a migration reversible by expanding and contracting: four deploys, the rule that justifies them, and what adding a column actually costs.
24 minutesTechnical content last reviewed on 17 Sept 2026
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What this lesson builds
- Deploying a version you can switch back from
- Administering PostgreSQL: access, connections and growth
End of the course
Administering PostgreSQL: access, connections and growth
Who may connect, how many at once, what the database is doing right now, and why it takes more space than the data inside it.
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