Finally they are here. We have waited for so long. With the release of ESX 4 update 2 NFS statistics is now available for NFS datastores.
This should make storage troubleshooting a lot easier and accessible. Well done VMware.
Enhancement of the esxtop/resxtop utility— vSphere 4.0 Update 2 includes an enhancement of the performance monitoring utilities, esxtop and resxtop. The esxtop/resxtop utilities now provide visibility into the performance of NFS datastores in that they display the following statistics for NFS datastores: Reads/s, writes/s, MBreads/s, MBwrtn/s, cmds/s, GAVG/s(guest latency).