Who is using high I/O

Is there a way I can see what process on a VM is using high i/o on the NFS drive it resides on?

We have about a hundred VMs all on a single NFS and are seeing high I/O.  It appears that all the machines are spiking at once.

These are all XenApp 4.5 Servers running on ESXi 5.0 U1
ServerNotFoundAsked:
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ServerNotFoundAuthor Commented:
PS, we are running vFoglight if that helps to analyze
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
What underlying technology is the NFS datastore?
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ServerNotFoundAuthor Commented:
The other is asking more about the NetApp side, while this focuses on the XenApp/vFoglight side.

I would have put them together, but it seemed messy.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
You may be able to a find process which is using the disk (which is a virtual disk  - vmdk).

using Sysinternals Utilities, Process Monitor, File Monitor

http://technet.microsoft.com/en-us/sysinternals/bb896645.aspx

esxtop is also your friend, see my EE Article

HOW TO:  Performance Monitor vSphere 4.x or 5.0
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ServerNotFoundAuthor Commented:
Awesome, giving these a try now.
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ServerNotFoundAuthor Commented:
Looking at procmon, but not sure where to set the I/O to show.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
it's not really going to show I/O, but it will show disk activity.

other than using perfmon in the VM, and esxtop.
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ServerNotFoundAuthor Commented:
Thanks!

Perfmon will show I/O, but can it show you what process is using the I/O?

Same question for esxtop.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Are you sure it's a process?
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ServerNotFoundAuthor Commented:
I've requested that this question be deleted for the following reason:

Not able to reproduce to test
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