Microsoft Windows guests running Oracle VM PV Drivers for Microsoft Windows may sometimes experience slow performance issues, for example, slow performance may be encountered during database start-up on Microsoft Windows Server 2016.
From Microsoft Windows Vista and Microsoft Windows Server 2008 onwards, you can enable the exposure of Windows virtualization (also referred to as viridian) compatible entitlements to Microsoft Windows guest operating systems. Enabling viridian support is strongly recommended to ensure improved performance for all Microsoft Windows guest operating systems running Oracle VM PV Drivers for Microsoft Windows.
Workaround: Use the Oracle VM Manager Web Interface Release 3.4.5 or later to edit the Microsoft Windows guest virtual machine and enable viridian support.
Enabling viridian support is permitted for all Microsoft Windows guest operating system types. However, it is only effective from Microsoft Windows Vista and Microsoft Windows Server 2008 onwards.
Bug 27333866