Scale Up Azure SQL Database — High DTU Usage | Azure Database Administrator Associate Explained
This DP-300 practice question tests your understanding of monitor, configure, and optimize database resources. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Exhibit
Refer to the exhibit. The following KQL query is run in Azure Monitor to analyze performance:
AzureMetrics
| where ResourceProvider == "MICROSOFT.SQL"
| where MetricName == "dtu_consumption_percent"
| where TimeGenerated > ago(1h)
| summarize avg(Maximum) by bin(TimeGenerated, 5m)
You observe that the average of Maximum DTU consumption over the last hour is consistently above 90%. What should you do next?
Exhibit
Refer to the exhibit. The following KQL query is run in Azure Monitor to analyze performance:
AzureMetrics
| where ResourceProvider == "MICROSOFT.SQL"
| where MetricName == "dtu_consumption_percent"
| where TimeGenerated > ago(1h)
| summarize avg(Maximum) by bin(TimeGenerated, 5m)
A
Scale up the database to a higher service tier or increase DTU.
High DTU consumption indicates need for more resources.
B
Enable Query Store to analyze top queries.
Why wrong: Analysis is good but action to scale is more direct.
C
Rebuild all indexes in the database.
Why wrong: Index rebuild may help fragmentation, but high DTU suggests overall resource shortage.
D
Do nothing; it's normal for DTU to be high.
Why wrong: Sustained high DTU can cause throttling and poor performance.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Scale up the database to a higher service tier or increase DTU.
The correct answer is A. When average DTU consumption is consistently above 90%, it indicates high resource usage. Scaling up the database to a higher service tier or increasing DTUs directly addresses the resource pressure and improves performance. Option B is incorrect because enabling Query Store is a diagnostic tool to identify performance issues, but it does not provide immediate relief. Option C is incorrect because rebuilding indexes can help with fragmentation but may not address the underlying resource limitation. Option D is incorrect because sustained high DTU can lead to performance degradation and should be addressed.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Scale up the database to a higher service tier or increase DTU.
Why this is correct
High DTU consumption indicates need for more resources.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable Query Store to analyze top queries.
Why it's wrong here
Analysis is good but action to scale is more direct.
✗
Rebuild all indexes in the database.
Why it's wrong here
Index rebuild may help fragmentation, but high DTU suggests overall resource shortage.
✗
Do nothing; it's normal for DTU to be high.
Why it's wrong here
Sustained high DTU can cause throttling and poor performance.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-300 question in full detail.
Identify which DP-300 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Monitor, configure, and optimize database resources — This question tests Monitor, configure, and optimize database resources — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Scale up the database to a higher service tier or increase DTU. — The correct answer is A. When average DTU consumption is consistently above 90%, it indicates high resource usage. Scaling up the database to a higher service tier or increasing DTUs directly addresses the resource pressure and improves performance. Option B is incorrect because enabling Query Store is a diagnostic tool to identify performance issues, but it does not provide immediate relief. Option C is incorrect because rebuilding indexes can help with fragmentation but may not address the underlying resource limitation. Option D is incorrect because sustained high DTU can lead to performance degradation and should be addressed.
What should I do if I get this DP-300 question wrong?
Identify which DP-300 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. You are monitoring an Azure SQL Database and notice that the average CPU usage is consistently above 90%. The database is using the S3 service tier. What should you do first to resolve this performance issue?
easy
A.Enable read scale-out
B.Wait for Automatic tuning to provide recommendations
C.Scale down to a lower service tier
✓ D.Scale up to a higher service tier
Why D: Scaling up to a higher service tier (e.g., S4) provides more CPU resources, which directly addresses the high CPU usage. Option D is correct. Option A is incorrect because enabling read scale-out does not increase CPU capacity. Option B is incorrect because automatic tuning may provide recommendations, but it is not the first action to take for immediate CPU pressure. Option C is incorrect because scaling down to a lower tier would reduce CPU resources, making the problem worse.
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Question Discussion
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