2V0-621 · Question #159
An administrator is troubleshooting a CPU performance issue for a virtual machine. Which three esxtop counters may demonstrate CPU contention? (Choose three.)
The correct answer is A. %RDY C. %MLMTD E. %CSTP. CPU contention in esxtop is identified by counters that show a VM is being denied, throttled, or delayed from receiving CPU time rather than actively executing.
Question
An administrator is troubleshooting a CPU performance issue for a virtual machine. Which three esxtop counters may demonstrate CPU contention? (Choose three.)
Options
- A%RDY
- B%RUN
- C%MLMTD
- D%WAIT
- E%CSTP
How the community answered
(53 responses)- A77% (41)
- B15% (8)
- D8% (4)
Why each option
CPU contention in esxtop is identified by counters that show a VM is being denied, throttled, or delayed from receiving CPU time rather than actively executing.
%RDY (Ready) measures the percentage of time the VM was ready to execute but could not be scheduled onto a physical CPU, which is the most direct indicator of CPU contention.
%RUN shows the proportion of time the VM was actively running on a physical CPU, which measures utilization rather than any form of CPU scheduling delay or contention.
%MLMTD (MLB Limited) indicates the percentage of time the VM's CPU usage was artificially capped by a configured CPU limit setting, representing resource-imposed contention.
%WAIT reflects time the VM spent in a guest-level idle or I/O wait state, which is not a CPU scheduling contention metric.
%CSTP (Co-Stop) reflects the percentage of time a multi-vCPU VM was stalled waiting for all its vCPUs to be simultaneously co-scheduled, a form of SMP scheduling contention.
Concept tested: esxtop CPU contention counter identification
Source: https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.monitoring.doc/GUID-7B49F1EE-CF81-4E23-A1C6-6EDC8CA8AB0C.html
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