DP-203 Practice Question: Secure, monitor, and optimize data storage and data processing
Which THREE metrics should you monitor to optimize the performance of an Azure Synapse Analytics dedicated SQL pool? (Choose three.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
DWU (Data Warehouse Unit) usage percentage
Options B, C, and E are correct. Option B: DWU usage percentage indicates whether the pool is under- or over-provisioned, helping optimize performance. Option C: Active queries count monitors concurrency and workload. Option E: Memory grant waiters count shows queries waiting for memory, which can indicate memory pressure and affect query performance. Option A: Storage used percentage is about capacity, not performance. Option D: Buffer cache hit ratio is more relevant for SQL Server, not directly for Synapse dedicated SQL pool performance optimization.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Storage used percentage
Why it's wrong here
Storage used percentage is a capacity metric, not directly related to query performance optimization.
- ✓
DWU (Data Warehouse Unit) usage percentage
Why this is correct
DWU usage percentage indicates if the pool is under- or over-provisioned, helping to optimize performance by adjusting resources.
- ✓
Active queries count
Why this is correct
Active queries count helps monitor concurrency levels and workload, which is important for performance tuning.
- ✗
Buffer cache hit ratio
Why it's wrong here
Buffer cache hit ratio is more relevant for SQL Server and not a primary metric for Synapse dedicated SQL pool performance optimization.
- ✓
Memory grant waiters count
Why this is correct
Memory grant waiters count identifies queries waiting for memory, which can indicate memory pressure and impact query performance.
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