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? Row-level locking MVCC Table partitioning Index-only scans None Show Hint MVCC allows multiple transactions to access the same data without locking, reducing contention and improving concurrency. 2. Which of the following best describes the purpose of the 'pg_clog' in PostgreSQL? It tracks the commit status of transactions. It stores the transaction logs for recovery. It manages the configuration settings. It indexes the database tables. None Show Hint pg_clog' tracks the commit status of transactions, helping PostgreSQL determine the visibility of 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
