PAS-C01 Design of SAP Workloads on AWS Practice Question
An SAP HANA database is running on an r5.8xlarge instance. The administrator notices high swap usage and suspects memory pressure. Which AWS metric should be monitored to confirm memory utilization?
⚠ Common exam trap
Test-takers frequently assume EC2 namespace metrics include memory utilization, but AWS intentionally omits guest OS memory from EC2 metrics, requiring the CloudWatch agent to capture it.
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
✓
CWAgent namespace metrics
The CWAgent namespace metrics are correct because the CloudWatch agent, when installed on the EC2 instance, can capture detailed OS-level memory utilization metrics (such as `mem_used_percent` and `mem_available_percent`) that are not available in the default EC2 or EBS namespaces. This allows the administrator to directly confirm memory pressure causing high swap usage on the SAP HANA database.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
AWS/Lambda namespace metrics
Why it's wrong here
Lambda metrics are for serverless functions, not EC2 instances.
- ✓
CWAgent namespace metrics
Why this is correct
The CloudWatch agent publishes memory metrics under the CWAgent namespace.
- ✗
EC2 namespace metrics
Why it's wrong here
EC2 namespace does not include memory metrics by default; custom metrics require the CloudWatch agent.
- ✗
EBS namespace metrics
Why it's wrong here
EBS metrics measure volume performance, not instance memory.
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Written by Johnson Ajibi, MSc IT Security
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