Yes, good obvservation.
nfsstat is just a dummy light.
Accept no action items purely on a view of a light on the dashboard.
On Mon, Jun 16, 2014 at 12:06 PM, Will.Burchell@skanska.co.uk wrote:
Thanks
I reset with the -z switch
I then run -d again a 5 minutes later. Many of the counters are in the 10's so I am happy with this. However 1 server is in the thousands already. This is a windows 2000 server (don't ask please!) which has a misaligned C drive but I have used the "functional aligned" datastore in VSC to get around this. I assume nfsstat -d won't understand that hence the counters in the thousands
William
*From:* Jordan Slingerland [mailto: Jordan.Slingerland@independenthealth.com] *Sent:* 16 June 2014 19:57 *To:* Burchell, Will (ITSD); Toasters@teaparty.net *Subject:* RE: High CPU VM misalignment confusion
First off, make sure the values in nfsstat -d are actually incrementing significantly by running nfsstat -z to clear the counters and then wait a while and looking at nfsstat -d again.
You may find that you are only doing a handful of unaligned ops and not hundreds or thousands per second.
--Jordan
*From:* toasters-bounces@teaparty.net [ mailto:toasters-bounces@teaparty.net toasters-bounces@teaparty.net] *On Behalf Of *Will.Burchell@skanska.co.uk *Sent:* Monday, June 16, 2014 2:50 PM *To:* Toasters@teaparty.net *Subject:* High CPU VM misalignment confusion
Hello. I am hoping you can guide me in the right direction
We have been experiencing very high CPU load on a 7-mode HA pair of 3270 controllers run 8.1.3P2
We have worked with netapp support on these issues and they note our workload is very high on one controller (where we run our VMware setup from)
We also have so called "bad practice" where we are running our exchange ISCSI LUNs on SATA with logs and dbs on the same aggregate (currently separating this out as I type)
I have been told by support we have VMDK misalignment, however I spent a long time a few months ago resolving this firstly by using the VSC tool to confirm the problem and then fixing it with a combination of MBRALIGN and VMware converter as a V2V process
The support guy tells me he seems misalignment when he runs nfsstat -d but MBRSCAN shows these are aligned. What is going on here?
Trying to reduce our CPU and IO burden but getting conflicting information.
Finally I think we should look to upgrade to 8.1.4P2 to remove some bugs? We would consider 8.2.x but I don't think we can as we run Exchange 2010 (using SME 6.x etc)
Thanks in advance
William
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