Query Planning & Statistics (EXPLAIN ANALYZE) Quiz Home › PostgreSQL DBA › Query Planning & Statistics (EXPLAIN ANALYZE) 🔍 Postgres Database Administration – Query Planning & Statistics (EXPLAIN ANALYZE) 20 questions · 15 min timer · Explanations included · Free 1. What is the impact of a high 'Rows Removed by Join Filter' count in a query execution plan? It indicates efficient use of indexes. It suggests that the join condition is filtering out many rows, potentially indicating an inefficient join strategy. It shows that the query is CPU-bound. It means the query is I/O-bound. None 1 out of 20 2. What does the 'Buffers Hit' metric in EXPLAIN ANALYZE indicate? The number of times a query was executed. The number of buffer cache hits during query execution. The number of rows returned by the query. The number of disk blocks read during query execution. 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 upTime is Up!
