Windows Server 2012 HyperV VMs becoming extremely sluggish and slow

I have recently set up a new system for a client consisting of a single Dell T320 server with Xeon E5-2350 2.2GHz 6 core cPU and 32GB of RAM.  Windows Server 2012 Standard is installed on the bare metal, and runs only the HyperV role.  It is not
joined to any domains.
It hosts two VMs, one a Windows Server 2012 Standard VM containing the RDS related roles acting as remote desktop server, with 10GB RAM allocated and 3 cores.  Only 5 people use the terminal server concurrently.
The second VM is a Windows Server 2008 R2 based primary domain controller, with 16GB of RAM allocated and 3 cores.  It runs the AD role, as well as Exchange and GFI MailEssentials 2012.  Avira is also installed on this VM.
The problem is that the system will function properly for 3-4 days, then suddenly it goes into a state where a multitude of applications would start consuming inordinate amount of CPU time, and become very, very slow.  Almost like the hypervisor goes
into a software emulation mode where everything runs like molasses.  This affects BOTH VMs equally.  For example, Exchange and GFI on the Windows 2008 R2 VM together consume about 25% CPU, most of it is spent in kernel CPU time.  At the same
time, in the other Windows Server 2012 VM, svchost, Taskmgr, WMIPrvSE, LogonUI, Explorer,  sqlservr, wsmprovhost etc. will all consume a total of about 70% CPU time, this time 99% of this is user time, not kernel time.  When one user starts any application,
be that internet explorer, firefox or TaxPrep, the CPU spikes up to 100%.  
All while nobody is using the system, the system is idle and no mails are flowing in or out of the system.  A reboot of the VMs does not fix anything, even a reboot of the host server does not fix anything.  When I yanked out the two power supplies
and performed a hardware diagnostic (which came back 100% OK), it booted up and the slowness was gone for 3 days, until today when it started acting up again like I described above.  
One more thing, when the system behaves normally the sunspider javascript benchmark in IE10 takes 316ms to execute (average) on the HyperV host operating system.  When the system goes slow like this, I pause the two VMs in HyperV then run sunspider
again, only to be greeted by an average time of 5084ms.  So this clearly does not only affect the virtual machines but the host operating system as well. My gut still tells me the hypervisor is getting messed up somehow.
Any ideas?  This is a major problem and I have no idea what is causing it.  

We have had the EXACT same thing happen with a Dell T320 on two separate servers. The first one was running SQL Server 2008 with nothing else funny going on. It ran fine for a month or so, then it developed this slowness issue. We finally installed SQL on
a loaner box (without Hyper-V) and it worked fine. We brought the T320 back to our shop and tested the hell out of it with Dell's assistance and it was NTF. Took it back onsite and moved an SBS 2011 VM over to it. After a few days, it ground to a halt. CPU
utilization was 100%. I started shedding services, killing Exchange, Sharepoint, etc. Even stripped to the essentials, the CPU was still up in the 60-70% range. 
I put a T310 out onsite and downed the guest SBS vm. I copied the HUGE vhd over to the T310 (running Server 2008r2 with the Hyper-V role) and it ran perfectly. CPU at about 2-4%, spiking to 15% occasionally.
We finally concocted a story that the USB controller was bad, so they replaced the motherboard (not the CPUs) and it all seems to be working OK now after we sunk at least 100 man-hours into the problem.
Our second one is a similar setup. T320, Server 2012, Hyper-V role, SBS 2011 Standard and a couple of member servers running basic apps. No one can find any problem and everyone acts like this is something new, although my posting comes one year after Tim's
original posting.
MCP SBSC

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  • Windows Server 2012 R2 RDS + User profile Disks + App-V = Explorer.exe crashing all of the time

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    I forgot to include the application event log entry for explorer.exe crashing:
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  • SharePoint Foundation 2010 SP2 running on Windows Server 2012 R2

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    Romeo Donca, Orange Romania (MCSE, MCITP, CCNA) Please Mark As Answer if my post solves your problem or Vote As Helpful if the post has been helpful for you.

  • Oracle database 12c on Windows Server 2012

    Hello,
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    Windows Server 2008 x64 and Windows Server 2008 R2 x64 - Standard, Enterprise, Datacenter, Web, and Foundation editions.
    Windows 7 x64 - Professional, Enterprise, and Ultimate editions
    Windows 8 x64 and Windows 8.1 x64 - Pro and Enterprise editions
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    http://docs.oracle.com/database/121/NXDQI/toc.htm#NXDQI111
    Best Regards,
    Elton Ji
    Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact [email protected] .

  • Windows Server Backup scheduled task run successfully but backup do not start (not running) on Windows Server 2012

    Hi,
    A backup job has been setup on Windows Server 2012 (Platform: Win32NT; ServicePack: ; Version: 6.2.9200.0; VersionString : Microsoft Windows NT 6.2.9200.0) via Windows Backup Software UI (Local Backup 1.0).
    It is appearing as a scheduled task "\Microsoft\Windows\Backup\Microsoft-Windows-WindowsBackup" belonging to user 'nt authority\system' in task scheduler.
    The problem is that the Backup job never start despite the scheduled task running and completing successfully (when run automatically or manually)!
    Would you be able to explain why and assist in resolving that issue?
    Here is what we know:
    When the backup is run manually via the Windows Backup Software UI, it works fine.
    When the backup is run via command line (as set in schedule task) in a cmd command prompt (as local/domain 'administrator' or as 'nt authority\system' which is possible by running command prompt via 'PsExec.exe -i -s cmd'), something like "%windir%\System32\wbadmin.exe
    start backup -templateId:{f11eb3aa-74e7-4ff4-a57b-d8d567ee3f77} -quiet", it works fine.
    If you manually run the preset scheduled task while logged in as administrator, the task run and complete successfully but the backup job does not start.
    Idem if you schedule task is run automatically at scheduled time.
    The schedule task run and complete successfully but the backup job does not start.
    It is confirmed by running the following in a command prompt as 'nt authority\system':
    schtasks /run /tn "\Microsoft\Windows\Backup\Microsoft-Windows-WindowsBackup"
    SUCCESS: Attempted to run the scheduled task "\Microsoft\Windows\Backup\Microsoft-Windows-WindowsBackup".
    Despite success result, the Backup job does not start running...
    No errors or warning appears anywhere in Event Logs (Microsoft > Windows > Backup or Task Scheduler) nor in the scheduled task History tab. The schedule task complete successfully but no Backup job is run...
    If scheduled task automatically set by Windows Backup software is duplicated (copied) and set manually it runs fine as 'administrator' and as 'nt authority\system' (subject that 'nt authority\system' is added to the 'Backup Operators' AD group).
    Here is an export of the current pre-set schedule task, is there any settings that need to be changed to make it works?
    <?xml version="1.0" encoding="UTF-16"?>
    <Task version="1.4" xmlns="http://schemas.microsoft.com/windows/2004/02/mit/task">
      <RegistrationInfo>
        <Author>MYDOMAIN\SERVER1</Author>
        <SecurityDescriptor>D:AR(A;OICI;GA;;;BA)(A;OICI;GR;;;BO)</SecurityDescriptor>
      </RegistrationInfo>
      <Triggers>
        <CalendarTrigger id="Trigger 1">
          <StartBoundary>2014-07-14T21:00:00</StartBoundary>
          <Enabled>true</Enabled>
          <ScheduleByDay>
            <DaysInterval>1</DaysInterval>
          </ScheduleByDay>
        </CalendarTrigger>
      </Triggers>
      <Principals>
        <Principal id="Author">
          <UserId>S-1-5-18</UserId>
          <RunLevel>HighestAvailable</RunLevel>
        </Principal>
      </Principals>
      <Settings>
        <MultipleInstancesPolicy>Parallel</MultipleInstancesPolicy>
        <DisallowStartIfOnBatteries>true</DisallowStartIfOnBatteries>
        <StopIfGoingOnBatteries>false</StopIfGoingOnBatteries>
        <AllowHardTerminate>true</AllowHardTerminate>
        <StartWhenAvailable>true</StartWhenAvailable>
        <RunOnlyIfNetworkAvailable>false</RunOnlyIfNetworkAvailable>
        <IdleSettings>
          <StopOnIdleEnd>false</StopOnIdleEnd>
          <RestartOnIdle>false</RestartOnIdle>
        </IdleSettings>
        <AllowStartOnDemand>true</AllowStartOnDemand>
        <Enabled>true</Enabled>
        <Hidden>false</Hidden>
        <RunOnlyIfIdle>false</RunOnlyIfIdle>
        <DisallowStartOnRemoteAppSession>false</DisallowStartOnRemoteAppSession>
        <UseUnifiedSchedulingEngine>false</UseUnifiedSchedulingEngine>
        <WakeToRun>false</WakeToRun>
        <ExecutionTimeLimit>P3D</ExecutionTimeLimit>
        <Priority>7</Priority>
      </Settings>
      <Actions Context="Author">
        <Exec>
          <Command>%windir%\System32\wbadmin.exe</Command>
          <Arguments>start backup -templateId:{f11eb3aa-74e7-4ff4-a57b-d8d567ee3f77} -quiet</Arguments>
        </Exec>
      </Actions>
    </Task>
    Thank you in advance for your feedback.

    Once again, the issue is not to run the backup manually from the command line but to have it run via the scheduled task setup by the Windows Backup software.
    By default, the schedule task is to be run as NT Authority\System, and when run under this account, the backup does not start (even though account is member of Backup Operators) and job can manually be run via elevated command prompt. This is not a normal
    behavior and constitute a major bug in Windows Server 2012.
    From my understanding the NT Authority\System account is a built-in account from Windows that should by default be part of the Administrators group (built-in) even though it does not explicitly appears like it in AD by default.
    This account shall have by default Administrators rights and Backup Operators rights (via the Administrators group) without being explicitly added to those groups (http://msdn.microsoft.com/en-gb/library/windows/desktop/ms684190%28v=vs.85%29.aspx). By design
    it is supposed to be the most powerful account which has unrestricted access to all local system resources. If that is not the case (as it seems) then this would constitute a major bug in Windows Server 2012 edition.
    As said previously and as you confirmed, currently by default NT Authority\System on Windows 2012 server cannot start backup manually via an elevated command prompt unless it is manually added to Backup Operators (or Administrators) group. But wouldn't that
    constitute a bug of Windows Server 2012?
    Our server has not yet been restarted since I added NT Authority\System account to the Administrators group explicitly manually so I cannot yet confirmed it would sort the issue. Indeed it is heavily in use so cannot easily be restarted. Will confirm when
    done.
    We also have an additional problem where after a while of last reboot, part of the Exchange ECP can no longer be properly loaded in the web browser due to compilation error (compilation is done via NT Authority\System account which seems to no longer have
    sufficient right to compile .NET code). What is strange is that it works at first and then stop working at some point... I am hopeful that adding NT Authority\System to the Administrators group would sort this issue as well but once again, that shall not be
    needed!!!
    Could a Windows Server 2012 update introduced some security policy changes or else that prevent NT Authority\System to have full power?

  • Office 2013 + Terminal Server Environment + Windows Server 2012 R2

    - Problems with Office 2013 (excel & Word) when use Roaming Profile (By Citrix) and folder redirection.
    Environment:
    2 x Windows Server 2012 R2 with Terminal Services installed and Office 2013 Professional Plus. Also this server are memeber of environment of Citrix XenDesktop 7.1
    Problem:
    In two servers I have installed Office 2013 Proffesional Plus and I have try to access to excel by Citrix.
    When I open excel with roaming profile (by citrix) activated, when I began to write I get a pop-up with the message:
    "Microsoft Excel cannot open or save any more documents because there is not enough available memory or disk space"
    And when I try to save the document I get the same message, and excel "crash" and closed.
    If I stop the roaming profile service. All works properly.
    The tests that I had made were:
    - Change DCOM config with correct permission.
    - Repair Office 2013 Installation.
    - Disable Protected Mode.
    Anybody could help me???
    Thanks in advance !!!

    Just searched a littler bit on this, below links might be helpful:
    http://howtoconfig.org/windows/excel-not-enough-available-memory-or-disk-space-available/
    http://social.technet.microsoft.com/Forums/office/en-US/2c753037-4600-4a4f-abd7-d228e2f20a38/2146827284microsoft-excel-cannot-open-or-save-any-more-documents-because-there-is-not-enough?forum=officesetupdeployprevious
    http://kb.jetreports.com/article/AA-00914/0/Microsoft-Excel-cannot-open-or-save-any-more-documents.html
    Go to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders  and modify the key Cache with a valid path (ie: C:\Windows\Temp ).
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