1. Monitor overall storage performance per HBA:
2. Monitor storage performance per LUN: *
3. Monitor storage performance per VM: *
* These options are only available in ESX 3.5 and greater.
The columns we are going to pay attention to are CMDS/s, DAVG/cmd, KAVG/cmd and GAVG/cmd. Below is a brief description of each of these
This is the number of IOPS or Input/Output Operations Per Second being sent to or coming from the device or VM being monitored.
This is the average response time in milliseconds per command being sent to the device.
This is the amount of time the command spends in the VMkernel.
This is the response time as it is perceived by the guest OS.