DP-300 Practice Question: Monitor, configure, and optimize database resources
Exhibit
Refer to the exhibit. The following Azure CLI output shows the current configuration of an Azure SQL Database:
{
"name": "mydb",
"requestedServiceObjectiveName": "S3",
"currentServiceObjectiveName": "S3",
"maxSizeBytes": 268435456000,
"status": "Online",
"zoneRedundant": false,
"readScale": "Disabled",
"autoPauseDelay": 3600
}The database 'mydb' is experiencing performance issues during peak hours. Based on the exhibit, what is the most likely cause?
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
✓
The service tier S3 is not sufficient for the workload.
The exhibit indicates the database is using the S3 service tier, which provides limited DTUs (100 DTU). During peak hours, this low tier is insufficient for the workload, leading to resource contention and performance degradation. Option A is incorrect because zone redundancy is related to high availability and failover, not peak-hour performance. Option C is incorrect because read scale is used for offloading read-only workloads, not for mitigating primary performance issues. Option D is incorrect because auto-pause delay (3600 seconds) affects serverless databases in idle periods, not active peak-hour usage.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Zone redundancy is disabled, causing failover delays.
Why it's wrong here
Zone redundancy is for high availability, not performance.
- ✓
The service tier S3 is not sufficient for the workload.
Why this is correct
S3 has limited DTU which can cause performance issues.
- ✗
Read scale is disabled, increasing load on primary.
Why it's wrong here
Read scale offloads read-only workloads, but not required for performance.
- ✗
The database is auto-pausing frequently due to autoPauseDelay.
Why it's wrong here
Auto-pause only occurs after 1 hour of inactivity, not during peak.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
Go deeper
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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