Data / Knowledge library
Transaction Isolation Level
Controls which effects concurrent transactions may observe
Why learn Transaction Isolation Level?
It trades coordination cost against anomalies and consistency
The problem it solves
It defines acceptable interference among simultaneous database operations
Where it came from
Transaction Isolation Level is a database concept that controls which effects concurrent transactions may observe. Its guarantees and tradeoffs depend on the concrete implementation and operating context.
Build your understanding
Work through these exercises in order. Try the task before opening a reference.
- Define Transaction Isolation Level and distinguish it from a neighboring concept.
- Choose a realistic task where Transaction Isolation Level is appropriate.
- Identify a failure mode caused by misusing Transaction Isolation Level.
- Interpret a small design or result involving Transaction Isolation Level.
- Explain one tradeoff or limitation of Transaction Isolation Level.
Documentation and sources
- PostgreSQL Documentation (www.postgresql.org)