PAS-C01 Operations and Maintenance Practice Question
An SAP system is experiencing high disk I/O latency. The operations team checks the Amazon CloudWatch metrics and finds that the Average Queue Length for the EBS volumes is consistently above the recommended threshold. Which action should be taken to address this issue?
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 provisioned IOPS for the EBS volumes.
Increasing the provisioned IOPS for the EBS volumes directly increases the number of I/O operations the volume can handle, reducing the average queue length. Option A is incorrect because st1 volumes are optimized for throughput, not IOPS. Option C is incorrect because EBS encryption does not improve I/O performance and may introduce a slight overhead. Option D is incorrect because increasing volume size does not directly affect queue length; for gp2 volumes, it only increases baseline IOPS indirectly via burst credits, but it is not a reliable method to reduce queue length.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Change the volume type to Throughput Optimized HDD (st1).
Why it's wrong here
st1 is for throughput, not low latency.
- ✓
Increase the provisioned IOPS for the EBS volumes.
Why this is correct
Higher IOPS can handle more requests, reducing queue length.
- ✗
Enable EBS encryption to improve I/O performance.
Why it's wrong here
Encryption adds overhead, not performance improvement.
- ✗
Increase the volume size to improve I/O performance.
Why it's wrong here
For gp2, larger size increases baseline IOPS, but not as effective as provisioned IOPS.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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