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Task Manager shows 100% cpu usage in VMware Guest Server

Posted on 2014-04-08
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Last Modified: 2014-04-27
Hi,  I'm running a WIndows 2012 Virtual Server with 4GB and 1 CPU allocated (standard allocation settings) on ESXi 5.1.

It's a WSUS server with the Database on another PC, so it doesnt do that much.

Looking at the Windows Resource Monitor it's not doing a lot but on the Windows Task Manager it's running at 100%.  Is this normal?
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Question by:jmsjms
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Expert Comment

by:Zephyr ICT
ID: 39985759
What exactly is using 100% and of what? CPU or Memory? Maybe you can post screenshots?
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Expert Comment

by:Haresh Nikumbh
ID: 39985763
Sort task manager and share screenshot to understand which process is taking utilization
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Author Comment

by:jmsjms
ID: 39985892
Just checked again and task manager is 86.7% CPU in Task Manager list.  Looking at details everything is at 0%.  THe CPu Graph is at 100% and doesnt seem to be moving.

In Resource Monitor there's 1-2% usage and nothing shows up on CPU usage.  The Graph just bumbles along at the bottom.
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Expert Comment

by:Haresh Nikumbh
ID: 39986003
Where this VM is stored local datastore or you are using san or nas?
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Expert Comment

by:Haresh Nikumbh
ID: 39986007
Can you please upload screen shot for task manger?
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Expert Comment

by:Haresh Nikumbh
ID: 39986016
Also check network utilization if that is normal ?
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Author Comment

by:jmsjms
ID: 39986045
Here's some pics.  THe network tab is showing 9% utilisation.

Data is stored locally.
TaskManagerProcesses.png
TaskManagerVResourceManager.png
TasmManager100percent.png
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Expert Comment

by:Haresh Nikumbh
ID: 39986091
Looks like its bug with Task manager on Windows 2012

Install below Kb and then reboot and verify again

KB which need to install on WS2012


Reference
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Author Comment

by:jmsjms
ID: 39986122
This one is already installed on the Server Feb 2012 and the server has been rebooted serveral times since then. :-(
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Expert Comment

by:Aaron Tomosky
ID: 40006973
Is the machine sluggish? Vmware shares CPU slices so the machine has a floating MHz internally. What does the vsphere console show for vm CPU usage?
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Assisted Solution

by:Gerald Connolly
Gerald Connolly earned 500 total points
ID: 40007727
As the trace only just seems to have just started this spike could just be task manager starting up, does taskmanager run @100% continuosly - dont get confused between the processor running at 100% and the CPU being 100% used.
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Accepted Solution

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jmsjms earned 0 total points
ID: 40014431
Sorry about reply delay, I've just noticed that the task manager graph has "paused" underneath it.  

After a little search I found that you can unpause the CPU graph in Task Manager by using the View menu and selecting from the update speed sub menu.  

This resolved the issue.

You comment made me think a bit harder about the issue so I'll mark it as a solution with the points.  Many thanks.
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Author Closing Comment

by:jmsjms
ID: 40025560
My comment was the solution. Geralds comment was a good prompt so I awarded all points to him.
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