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. What is the role of XIDs in PostgreSQL's MVCC? They manage user permissions. They are used to lock tables during transactions. They uniquely identify each transaction. They optimize query performance. None 1 out of 20 2. Which PostgreSQL command is used to manually trigger the cleanup of old tuples to prevent transaction ID wraparound? REINDEX VACUUM CHECKPOINT ANALYZE None 2 out of 20 Loading questions... 3 out of 20 Loading questions... 4 out of 20 Loading questions... 5 out of 20 Loading questions... 6 out of 20 Loading questions... 7 out of 20 Loading questions... 8 out of 20 Loading questions... 9 out of 20 Loading questions... 10 out of 20 Loading questions... 11 out of 20 Loading questions... 12 out of 20 Loading questions... 13 out of 20 Loading questions... 14 out of 20 Loading questions... 15 out of 20 Loading questions... 16 out of 20 Loading questions... 17 out of 20 Loading questions... 18 out of 20 Loading questions... 19 out of 20 Loading questions... 20 out of 20 Click Submit to see your final score! Previous Start Quiz Next Time's up
