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Server 2012 + Hyper-V Performance Issues RRS feed

  • Question

  • Hi all,

    We have recently upgraded from a 32bit Server 2008 to a Server 2012 on a HP ProLiant ML350p Gen8, E5-2609, 1P, 20GB RAM hardware. Since setting up a VM we have started to have performance issues which are occurring every 2 -3 days.

    The new server has following roles installed:

    • Active Directory
    • DNS
    • File and Storage Services
    • Hyper-V

    The server also hosts MYOB and banking software that uses MSSQL. There are 2 VMs hosted in Hyper-V:

    • Staff Management Server
      • Server 2012
        • Roles installed
          • File and Storage Services
          • IIS (for FTP server)
          • NAP
          • Print Services
          • Remote Desktop Services
      • 2 Virtual Processors
      • 8GB RAM
      • 50GB Fixed Size vhdx with 26GB of free space
    • Windows 7 machine
      • Windows 7 64 bit
      • 1 Virtual Processor
      • 4GB RAM
      • 127GB Fixed size vhdx with 97GB of free space

    The VM for the staff management software was running 10 days to 2 weeks before it was shifted to the new server without an issue. After the changeover we started to get performance issues. About every two working days the host server and the VM will virtually grind the system to a halt and can only be fixed by restarting the staff management VM. As soon as that is done everything fires back into life. While everything is slow, CPU and RAM usage appears to be normal on the VM and host machine but disk activity does seem to be higher than normal. The slowness does not happen in the weekend and generally happens on weekday mornings. Users can be using the system ok for a few hours and then it will slow down. The suppliers of the software say it runs on Server 2012 and in similar configurations with other clients. Backups (Windows Server Backup) were running multiple times during the day but these were turned off due to interruption when the backup was taking place. The staff management software installed uses MSSQL (Microsoft SQL Server 2008 R2 (SP2) – 10.50.4000.0 (X64)). The software is accessed by file share on the local network. User’s data from remote sites is automatically uploaded via ftp. Remote managers (4 of them) also use remote desktop to access the backend login.

    What we have tried

    • Increased the amount of RAM in the Host machine
    • Increase the CPU and RAM on the VM
    • Disabling the other VM
    • Changed the VM drives from dynamic to fixed
    • Removed the backups happening during work hours

    The frequent interruptions are becoming a nightmare. Does anybody have any suggestions that might prevent this from happening?

    Monday, November 25, 2013 10:53 PM

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