The correct next step is to modify the Linux I/O scheduler to 'noop' and confirm the EBS-optimized instance attribute is enabled. This works because SAP HANA checkpoint writes are sequential in nature, and the default I/O scheduler (like CFQ or deadline) can introduce unnecessary reordering and fragmentation, which degrades throughput. The noop scheduler passes I/O requests directly to the storage device with minimal overhead, allowing the sequential write pattern to reach the EBS volume efficiently. On the AWS Certified SAP on AWS Specialty PAS-C01 exam, this question tests your understanding that simply scaling EBS IOPS or throughput won't fix a software-layer bottleneck—the I/O scheduler must be tuned to match the workload. A common trap is assuming more IOPS always helps, but the real issue is how the OS queues writes. Memory tip: think "sequential writes need noop—no operation, no interference."
PAS-C01 Operations and Maintenance Practice Question
This PAS-C01 practice question tests your understanding of operations and maintenance. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company is running a production SAP HANA database on an r5.4xlarge EC2 instance with EBS-backed storage. The operations team notices that the database checkpoint writes are frequently slow, causing application performance degradation. The team has already increased the EBS IOPS and throughput. What should the team do next to improve checkpoint write performance?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Modify the Linux I/O scheduler to 'noop' and ensure the EBS-optimized instance attribute is enabled.
Option C is correct because SAP HANA checkpoint writes are sequential and benefit from larger block sizes. The default Linux I/O scheduler can cause fragmentation; switching to noop or using NVMe instance storage with optimized settings is a best practice. Option A is wrong because increasing EBS IOPS further may not help if the issue is I/O scheduling. Option B is wrong because moving to gp2 provides lower performance than io1/io2 with provisioned IOPS. Option D is wrong because disabling checkpoint compression increases write volume and may worsen performance.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Modify the Linux I/O scheduler to 'noop' and ensure the EBS-optimized instance attribute is enabled.
Why this is correct
Using noop scheduler reduces latency and improves sequential I/O performance for SAP HANA checkpoints.
Related concept
Read the scenario before looking for a memorised answer.
✗
Change the EBS volume type from io1 to gp2 for higher throughput.
Why it's wrong here
gp2 has lower and burstable IOPS, which could degrade performance further.
✗
Disable SAP HANA checkpoint compression to reduce CPU overhead.
Increase the EBS volume size to gain additional baseline IOPS.
Why it's wrong here
Increasing volume size does not guarantee better checkpoint write performance if I/O scheduling is the bottleneck.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which PAS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Operations and Maintenance — This question tests Operations and Maintenance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Modify the Linux I/O scheduler to 'noop' and ensure the EBS-optimized instance attribute is enabled. — Option C is correct because SAP HANA checkpoint writes are sequential and benefit from larger block sizes. The default Linux I/O scheduler can cause fragmentation; switching to noop or using NVMe instance storage with optimized settings is a best practice. Option A is wrong because increasing EBS IOPS further may not help if the issue is I/O scheduling. Option B is wrong because moving to gp2 provides lower performance than io1/io2 with provisioned IOPS. Option D is wrong because disabling checkpoint compression increases write volume and may worsen performance.
What should I do if I get this PAS-C01 question wrong?
Identify which PAS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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