6. 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.