Using the vSphere Web Client, select the virtual machine. For example, select vCenter and in the navigation tree on the left select the virtual machine.
Right-click the virtual machine, and click Edit Settings.
Click Action All vCenter ActionsEdit Resource Settings.
Adjust the CPU reservation to an appropriate number in the Reservations field.
ADDITIONAL INFORMATION:
Ensure to change CPU reservation to 6600-7200 MHz for EMS and 8800-9600MHz for SBC. Default values are set to 3300 MHz for EMS and 4400 MHz for SBC.