LESSON 4.1
Transactions and isolation levels
Learn key techniques and workflows in PostgreSQL for Developers.
8m
intermediate
6,361 students
Overview
Isolation decides which concurrency anomalies you can still see. Read committed is the default, and it permits more than most people assume.
In this lesson you will:
- Keep transactions short and correctly scoped
- Compare read committed, repeatable read, and serializable
- Avoid deadlocks by ordering access consistently
Pro Tip
Use caching and revalidation wisely to ensure your app stays fast and data remains fresh without unnecessary requests.