MVCC Internals: Snapshots Quiz Home › PostgreSQL DBA › MVCC Internals: Snapshots 🔄 Postgres Database Administration – MVCC Internals: Snapshots 20 questions · 15 min timer · Explanations included · Free 1. In a high-concurrency environment, which PostgreSQL feature helps reduce contention when multiple transactions are accessing the same data? Index-only scans Row-level locking MVCC Table partitioning None Show Hint MVCC allows multiple transactions to access the same data without locking, reducing contention and improving concurrency. 2. Which PostgreSQL command is used to manually trigger the cleanup of old tuples to prevent transaction ID wraparound? CHECKPOINT VACUUM REINDEX ANALYZE None Show Hint The VACUUM command is used to clean up old tuples and prevent transaction ID wraparound by freezing tuples. Loading questions... Loading questions... Loading questions... Loading questions... Loading questions... Loading questions... Loading questions... Loading questions... Loading questions... Loading questions... Loading questions... Loading questions... Loading questions... Loading questions... Loading questions... Loading questions... Loading questions... Loading questions... Click Submit to see your final score! Previous Start Quiz Next Time's up
