DBS-C01 Monitoring and Troubleshooting Practice Question
A company uses Amazon ElastiCache for Redis as a caching layer for a web application. They notice increased latency and cache miss rates. The cache cluster has 5 nodes with replication. Which metric should be monitored to identify if the cache is under-provisioned?
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
✓
CPUUtilization
High CPUUtilization indicates the cache nodes are overloaded, suggesting the cache is under-provisioned and cannot handle the request volume. Option A is incorrect because ReplicationLag measures replication delays, not overall capacity. Option B is incorrect because CacheHits measure cache effectiveness, but a high miss rate could be due to capacity or other factors; CPU is more direct for throughput. Option D is incorrect because Evictions occur when memory is full, but CPU utilization is a better indicator of processing capacity constraints.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
ReplicationLag
Why it's wrong here
Replication lag indicates sync delays, not overall capacity.
- ✗
CacheHits
Why it's wrong here
Cache hits measure effectiveness, not capacity.
- ✓
CPUUtilization
Why this is correct
High CPU suggests nodes are processing too many requests.
- ✗
Evictions
Why it's wrong here
Evictions indicate memory pressure, not necessarily CPU.
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JA
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.