Symptoms
Consider the following scenario:
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You have a Windows Server 2012 R2-based Hyper-V cluster managed by System Center Virtual Machine Manager (SCVMM).
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You create a virtual machine (VM) in the Hyper-V cluster and enable the dynamic memory (DM).
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You restart the virtual machine management service (VMMS.exe).
In this scenario, you encounter the following issues:
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The memory demand is empty in the Hyper-V Manager UI.
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The performance counters for the DM do not exist.
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The DM operations on the VM do not work.
Cause
This issue occurs because of a missing call in OnServerStartup() function during the restart of VMMS.
Resolution
Update information
To resolve this issue, install update rollup 2955164. For more information about how to obtain this update rollup package, click the following article number to view the article in the Microsoft Knowledge Base:
2955164 Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 update rollup: May 2014
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
More Information
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates
