Concurrency and Locking Management Questions

Comprehensive understanding of how databases manage concurrent access and synchronization across transactions. Topics include transaction isolation levels and their trade offs, row level versus table level locking, lock escalation, lock timeouts, and lock contention and their effects on throughput and availability. Covers deadlock causes, detection and analysis techniques, prevention strategies and recovery patterns such as careful transaction ordering, reducing transaction duration, optimistic concurrency control, multiversion concurrency control, and retry with backoff. Includes diagnostics and monitoring approaches such as lock tables, deadlock graphs and transaction logs, as well as design practices like index design, short transactions, batching and advisory locks to reduce contention.