Question 6 of 144
SK0-005 troubleshooting Practice Question
A virtualization administrator notices that a critical VM on an ESXi host has high CPU Ready time (%RDY) according to performance charts. The VM has 8 vCPUs assigned, and the host has two physical CPUs with 8 cores each. Other VMs on the host are performing normally. Which of the following actions would MOST likely resolve the high CPU Ready time for this VM?
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
✓
Migrate the VM to another host with more available CPU capacity.
Option D is correct because high CPU Ready time indicates the VM is waiting for physical CPU resources. Migrating to a less contended host allows the VM to receive adequate CPU scheduling without waiting. Option A is wrong because adding physical cores is a hardware change that may not be immediately feasible and does not address the root cause; the current host may have sufficient capacity if the VM's vCPU count is appropriate. Option B is wrong because while CPU pinning can reduce overhead, it may not resolve contention if the host is oversubscribed; also, pinning can lead to other issues. Option C is wrong because reducing vCPUs might help if the VM is not using all vCPUs efficiently, but it could also hurt performance if the workload genuinely needs 8 vCPUs; migration is a less intrusive first step and often the recommended action in such scenarios.
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 physical cores in the host by adding another CPU.
Why it's wrong here
Adding physical cores is a hardware change that may not be immediately feasible and does not address the root cause; the host may have sufficient capacity if the VM's vCPU count is appropriate.
- ✗
Enable CPU affinity to pin the VM to specific physical cores.
Why it's wrong here
CPU pinning can reduce overhead but may not resolve contention if the host is oversubscribed; it can also lead to other issues.
- ✗
Reduce the number of vCPUs assigned to the VM to 4.
Why it's wrong here
Reducing vCPUs might help if the VM is not using all vCPUs efficiently, but it could hurt performance if the workload needs 8 vCPUs; migration is a less intrusive first step.
- ✓
Migrate the VM to another host with more available CPU capacity.
Why this is correct
High CPU Ready time indicates the VM is waiting for physical CPU resources. Migrating to a less contended host resolves the issue without changing the VM's configuration.
Visual reference
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Last reviewed: Jul 26, 2026
This SK0-005 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SK0-005 exam.
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