📄️ 16. Transactions and Concurrency
Control consistency and parallel workloads in PostgreSQL with transaction and locking strategies.
📄️ ACID and Transaction Control
Use PostgreSQL transactions (BEGIN/COMMIT/ROLLBACK/SAVEPOINT) to keep multi-step changes consistent, and apply timeouts and patterns that prevent long-lock incidents. Focus: ACID and Transaction Control.
📄️ Isolation Levels and Locking
Choose PostgreSQL isolation levels (READ COMMITTED, REPEATABLE READ, SERIALIZABLE) and apply row locks (FOR UPDATE, NOWAIT, SKIP LOCKED) to build safe concurrent workflows. Focus: Isolation Levels and Locking.
📄️ Deadlocks and Retry Patterns
Diagnose PostgreSQL deadlocks and serialization failures, prevent them with stable lock ordering, and implement safe retry strategies that preserve correctness under contention. Focus: Deadlocks and Retry Patterns.