Home » VMware » VCP510 » Which metric can be checked to determine if CPU contention exists on an ESXi 5.x host?
A company has converted several physical machines to virtual machines but are seeing significant performance issues on the converted machines.
The host is configured with sufficient memory and storage does not appear to be a bottleneck.
Which metric can be checked to determine if CPU contention exists on an ESXi 5.x host?
A. %RUN
B. %WAIT
C. %USED
D. %RDY
Correct Answer: D
Explanation/Reference:
%WAIT
The percentage of time the world spent in wait state.
This %WAIT is the total wait time. I.e., the world is waiting for some VMKernel resource. This wait time includes I/O wait time, idle time and among other resources.
Idle time is presented as %IDLE.
%RDY
The percentage of time the world is ready to run.
A world in a run queue is waiting for CPU scheduler to let it run on a PCPU. %RDY accounts the percentage of this time. So, it is always smaller than 100%.
Q: How do I know CPU resource is under contention?
A: %RDY is a main indicator. But, it is not sufficient by itself.
