The correct action is to increase the CPU shares for the ERP VM to prioritize its scheduling. This works because CPU shares determine the relative priority of a VM’s ready queue when physical cores are contended; by raising the ERP VM’s shares, the hypervisor allocates it a larger proportion of CPU cycles during the month-end processing spikes, directly reducing its ready time and co-stop time. On the VCP-DCV exam, this scenario tests your understanding of CPU scheduling fundamentals and the difference between shares, reservations, and limits—a common trap is to choose a reservation instead, but reservations guarantee a minimum, not priority during contention. Remember the mnemonic “Shares for Surges”: when ready time spikes are periodic, boost shares to prioritize the critical VM without wasting resources on a permanent reservation.
VCP-DCV vSphere Performance and Scaling Practice Question
This VCP-DCV practice question tests your understanding of vsphere performance and scaling. 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.
You manage a vSphere 7 environment with 20 hosts, each with 2 x 10-core CPUs and 512 GB RAM. The environment runs 300 VMs, including a critical ERP application that uses 8 vCPUs and 64 GB RAM. Recently, the ERP VM has been experiencing periodic performance degradation, especially during month-end processing. The host running the ERP VM shows CPU ready time averaging 8%, with spikes to 20% during the processing. The host has 10 other VMs, each with 2-4 vCPUs. The cluster has DRS enabled with default settings. You suspect CPU contention. Which two actions should you take to mitigate the issue? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Migrate the ERP VM to a host with fewer VMs to reduce CPU over-provisioning.
Option A is correct because migrating the ERP VM to a host with fewer VMs reduces the CPU over-provisioning ratio, directly lowering CPU ready time. With 8% average and 20% spikes, the host's physical CPU cores are oversubscribed; moving the VM to a less contended host alleviates the scheduling pressure without changing VM configuration.
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.
✓
Migrate the ERP VM to a host with fewer VMs to reduce CPU over-provisioning.
Why this is correct
Less contention on the target host reduces ready time.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable DPM and set the cluster to aggressive power management.
Why it's wrong here
DPM consolidates VMs, increasing contention.
✓
Increase the CPU shares for the ERP VM to prioritize its scheduling.
Why this is correct
Higher shares ensure the ERP VM gets more CPU time.
Related concept
Read the scenario before looking for a memorised answer.
✗
Increase the number of vCPUs on the ERP VM to 12 to distribute load.
Why it's wrong here
More vCPUs can increase ready time due to co-scheduling.
✗
Increase the memory allocation of the ERP VM to reduce ballooning.
Why it's wrong here
Memory does not affect CPU ready time.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse CPU ready time with memory pressure and choose to increase memory or vCPUs, but adding vCPUs actually increases co-scheduling overhead and worsens contention.
Detailed technical explanation
How to think about this question
CPU ready time measures the percentage of time a VM is ready to run but waiting for a physical CPU core to become available. In vSphere, the CPU scheduler uses a relaxed co-scheduling algorithm; with 8 vCPUs, the ERP VM requires all 8 cores to be scheduled concurrently, and high ready time indicates the host's CPU capacity is insufficient. DRS with default settings uses a migration threshold of 3 (conservative), which may not automatically move the VM; manual migration or adjusting DRS aggressiveness can help.
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.
TExam Day Tips
→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 practitioner preparing for the VCP-DCV exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
vSphere Performance and Scaling — This question tests vSphere Performance and Scaling — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Migrate the ERP VM to a host with fewer VMs to reduce CPU over-provisioning. — Option A is correct because migrating the ERP VM to a host with fewer VMs reduces the CPU over-provisioning ratio, directly lowering CPU ready time. With 8% average and 20% spikes, the host's physical CPU cores are oversubscribed; moving the VM to a less contended host alleviates the scheduling pressure without changing VM configuration.
What should I do if I get this VCP-DCV question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A VM configured with 4 vCPUs shows high co-stop time in performance metrics. What does co-stop time indicate and which action should be taken to improve performance?
easy
✓ A.Reduce the number of vCPUs to match workload requirements
B.Add more vCPUs to the VM
C.Enable hyperthreading on the host
D.Increase the VM's memory reservation
Why A: Co-stop time is time when the VM is ready to run but waiting for all vCPUs to be scheduled simultaneously. Reducing the number of vCPUs can alleviate this.
Variation 2. A VM is experiencing high CPU ready time. The host has 16 physical cores and 20 vCPUs total across all VMs. Which action is MOST likely to reduce the CPU ready time on the VM?
easy
A.Migrate the VM to another host with the same CPU load.
✓ B.Decrease the number of vCPUs on the VM.
C.Increase the number of vCPUs on the VM.
D.Increase the memory reservation for the VM.
Why B: Reducing the number of vCPUs on an over-provisioned VM decreases scheduling contention, lowering CPU ready time. Increasing vCPUs would worsen the issue. Migrating to another host with similar load would not help long-term. Increasing memory does not directly reduce CPU contention.
Variation 3. Which TWO factors contribute to increased CPU ready time on a vSphere host?
medium
A.Memory ballooning due to memory over-commitment.
✓ B.Over-provisioning of vCPUs relative to physical cores.
C.Using CPU affinity to pin VMs to specific cores.
✓ D.Enabling hyper-threading on hosts that already have high vCPU-to-core ratios.
E.High disk latency on the datastore.
Why B: Option B is correct because over-provisioning vCPUs relative to physical cores leads to contention for CPU resources. When the total number of vCPUs across all powered-on VMs exceeds the number of logical processors (including hyper-threads), the ESXi scheduler must time-share access, resulting in increased ready time as VMs wait for a physical core to become available.
Last reviewed: Jun 11, 2026
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This VCP-DCV practice question is part of Courseiva's free VMware 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 VCP-DCV exam.
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