By disabling the Windows prefetch and superfetch features, you can avoid generating prefetch files and the overhead associated with prefetch and superfetch operations. This action can reduce the growth of linked-clone machines and minimize IOPS on full virtual machines and linked clones.
About this task
To disable the prefetch and superfetch features, you must edit a Windows registry key and disable the Prefetch service on the virtual machine.
See the Microsoft TechNet Web site for information on how to use the Windows Registry Editor on Windows 7 and Windows 8.
- Start the Windows Registry Editor on the local Windows 7 or Windows 8 virtual machine.
- Navigate to the registry key called PrefetchParameters.
The registry key is located in the following path: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\PrefetchParameters.
- Set the EnablePrefetcher and EnableSuperfetch values to 0.
- Click .
- Select Services and click Open.
- Double-click the Superfetch service.
- In the Superfetch Properties (Local Computer) dialog, click Stop.
- In the Startup type menu, select Disabled.
- Click OK.