PAS-C01 Design of SAP Workloads on AWS Practice Question
An SAP system on AWS is experiencing high CPU ready time on the application server VMs. Which configuration change is most likely to reduce CPU contention?
⚠ Common exam trap
It's easy for candidates to assume adding more vCPUs (Option A) will solve performance issues, but CPU ready time is a scheduling contention problem that requires physical isolation, not more virtual resources.
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
✓
Move the instance to a dedicated host
CPU ready time indicates that the VM is ready to process instructions but is waiting for the physical CPU to become available, which is a symptom of CPU overcommitment on the host. Moving the instance to a dedicated host eliminates resource contention with other AWS customers' VMs by providing the instance with exclusive access to the physical CPU cores, thereby reducing or eliminating CPU ready time.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Increase the number of vCPUs assigned to the instance
Why it's wrong here
More vCPUs may increase contention.
- ✓
Move the instance to a dedicated host
Why this is correct
Dedicated host provides dedicated physical cores, reducing contention.
- ✗
Change instance tenancy to default
Why it's wrong here
Default tenancy shares resources with other AWS customers.
- ✗
Increase the instance memory
Why it's wrong here
Memory does not address CPU contention.
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