Home » VMware » VCP550D » Which parameter should the administrator check to monitor any storage-related vSphere overhead?
An administrator is using esxtop to troubleshoot a storage performance issue.
Which parameter should the administrator check to monitor any storage-related vSphere overhead?
A. DAVG
B. KAVG
C. GAVG
D. CMDS
Correct Answer: B
Explanation/Reference:
Explanation:
B: KAVG can be used to measure the amount of time the command spends in the VMkernel. This will indeed help when troubleshooting issues regarding storage performance.
Incorrect Answers:
A: DAVG is used to measure the average response time in milliseconds per command being sent to the device.
C: GAVG is used to measure the response time as it is perceived by the guest operating system.
D: CMDS is used to measure the total amount of commands per second and includes IOPS (Input/Output Operations Per Second) and other SCSI commands such as SCSI reservations, locks, vendor string requests, unit attention commands etc. being sent to or coming from the device or virtual machine being monitored.
References:
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1008205