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. Which of the following EXPLAIN ANALYZE outputs indicates a potential performance bottleneck? A high number of 'Rows Removed by Join Filter'. A low 'Buffers Hit' count compared to 'Buffers Read'. A high 'Buffers Written' count. A low 'Total Cost' value. None 1 out of 20 2. In a query execution plan, what does the 'Startup Cost' represent? The time taken to execute the entire query. The estimated cost to begin returning the first row of the result set. The cost associated with compiling the query. The cost of writing the result set to disk. 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!
