Memory hot add lets you add memory resources for a virtual machine while the machine is powered on.


  • The virtual machine has a guest operating system that supports Memory hot add functionality.
  • The virtual machine is using hardware version 7 or later.
  • VMware Tools is installed.


  1. In the vSphere Client inventory, right-click the virtual machine and select Edit Settings.
  2. Click the Options tab and under Advanced, select Memory/CPU Hotplug.
  3. Enable or disable memory hot add.
    • Enable memory hot add for this virtual machine.
    • Disable memory hot add for this virtual machine.
  4. Click OK to save your changes.