3 Replies Latest reply on Jul 12, 2019 3:40 AM by wila

    High disk usages when using virtual machines

    GnVm Novice

      Hi,

      I have created two VMs as

       

      Windows 10 32bit

      Memory: 1GB

      Processors: 1

      Hard Drive: 12GB

       

      Windows Server 2016

      Memory: 4GB

      Processors: 4

      Hard Drive: 20GB

       

      When I turn on either of two VMs or both VMs,

      I have seen Disk Usages 100%  in Performance tab of Task Manager of Host Computer.

       

      The Host Computer is a Windows 10 Lenovo Laptop with specifications:

      • Processor: Intel Core i5-8250U Processor
      • GPU: AMD Radeon 540 2GB GDDR5
      • RAM: 12 GB DDR4 2400MHz
      • HDD: 1TB

       

      Please advise me, what steps I can follow?

       

      Regards

      GnVm

        • 1. Re: High disk usages when using virtual machines
          wila Guru
          Community WarriorsUser ModeratorsvExpert

          Hi,

           

          The 4 cores on the Win2016 VM is probably a bit much, but it shouldn't cause the high disk usage spike, at least not constantly.

           

          There's a few possible reasons.

           

          - a problematic antivirus product (in particular AVG/Avast/BitDefender, see also XP VM suddenly slow, Win 7 fine )

          - a config issue with any antivirus product (did you exclude the virtual machine's folders from your antivirus product?)

          - Windows update running the disk high

          - Disk defragmentation service running in the guest

          - Windows System Restore in the guest

          - a slow host disk drive (is it a 5400 / 4200 rpm disk by any chance?)

           

          --

          Wil

          | Author of Vimalin. The virtual machine Backup app for VMware Desktop Products
          | Vimalin : Automated backups for VMware Fusion and VMware Workstation Professional
          | More info at https://www.vimalin.com
          | Twitter @wilva
          | VMware Wiki at http://www.vi-toolkit.com
          • 2. Re: High disk usages when using virtual machines
            GnVm Novice

            The host os is Windows 10 and no anti-virus installed.

             

            Only Windows Defender is there which is by default security with Windows 10.

             

            I am using VMware Workstation in my laptop and it's new (purchased about 20 days ago).

             

            Using some software, I found it's HDD is Seagate Mobile ST1000LM035 - 1rk72.

            In Data Sheet of HDD, I found it's 5400 rpm.

             

            Now what do you suggest?

            • 3. Re: High disk usages when using virtual machines
              wila Guru
              User ModeratorsCommunity WarriorsvExpert

              Hi,

               

              For hosting VMs an SSD is better as it can provide a lot more IOPS.

               

              However having said that, if you run just one VM on your host, then it should not go into high disk usage all the time.

              I would expect to see high disk usage spikes, not to have them all the time.

               

              As mentioned in my previous reply, there can be many reasons for that to happen.

              If you use Windows Defender, then it still is recommended to exclude your VMs as it is still an antivirus product that doesn't handle scanning large binary virtual disks well.

               

              See:

              https://www.windowscentral.com/how-exclude-files-and-folders-windows-defender-antivirus-scans

               

              --

              Wil

              | Author of Vimalin. The virtual machine Backup app for VMware Desktop Products
              | Vimalin : Automated backups for VMware Fusion and VMware Workstation Professional
              | More info at https://www.vimalin.com
              | Twitter @wilva
              | VMware Wiki at http://www.vi-toolkit.com