DBS-C01 Monitoring and Troubleshooting Practice Question
A company is running an Amazon Aurora MySQL database cluster. The database specialist notices that the write latency is high during peak hours. The cluster consists of one writer and two reader instances. Which action should the specialist take to reduce write latency?
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
✓
Increase the instance class of the writer instance to a larger size.
Increasing the instance class of the writer instance provides more CPU and memory resources, which can directly improve write throughput and reduce write latency during peak loads. Option A is incorrect because Auto Scaling in Aurora adjusts the number of reader instances, not the writer capacity. Option C is incorrect because Multi-AZ is already inherent in Aurora; enabling Multi-AZ does not affect write latency. Option D is incorrect because adding more reader instances distributes read traffic but does not reduce write latency on the writer.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable Auto Scaling on the cluster to automatically adjust capacity.
Why it's wrong here
Auto Scaling does not adjust instance class automatically.
- ✓
Increase the instance class of the writer instance to a larger size.
Why this is correct
A larger instance class provides more CPU and memory, reducing write latency.
- ✗
Enable Multi-AZ deployment for the cluster.
Why it's wrong here
Aurora is already Multi-AZ; enabling Multi-AZ does not reduce write latency.
- ✗
Add more reader instances to distribute the read load.
Why it's wrong here
Read replicas do not reduce write latency.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DBS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DBS-C01 exam.