PAS-C01 Design of SAP Workloads on AWS Practice Question
An SAP system on AWS is experiencing performance issues due to high I/O wait times on the database server. The database runs on an EC2 instance with EBS volumes. Which THREE actions can improve the I/O performance? (Choose THREE.)
⚠ Common exam trap
Watch out — candidates often think increasing volume size (Option A) improves burst performance, but AWS gp2 burst credits are based on volume size—larger volumes actually have higher baseline performance and longer burst duration, so reducing size is counterproductive.
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
✓
Use instance store SSDs for the database logs
Instance store SSDs provide very low latency and high IOPS directly attached to the EC2 host, which is ideal for database log files that require frequent, synchronous writes. By offloading the logs from EBS to instance store, you reduce contention on the EBS volumes and improve overall I/O performance for the SAP 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.
- ✗
Reduce the volume size to increase the burst duration
Why it's wrong here
Smaller volumes have lower baseline performance.
- ✓
Use instance store SSDs for the database logs
Why this is correct
Instance store offers low latency for temporary data.
- ✓
Use an EBS-optimized EC2 instance
Why this is correct
Dedicated bandwidth for EBS improves performance.
- ✓
Increase the provisioned IOPS of the EBS volumes
Why this is correct
Higher IOPS directly improve performance.
- ✗
Configure RAID 0 of multiple gp2 volumes
Why it's wrong here
RAID 0 may increase throughput but still suffers from burst credit exhaustion.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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