You can reserve a certain amount of virtual flash resource for host swap cache.


Set up a virtual flash resource. Set Up Virtual Flash Resource.

Note: If an ESXi host configured with virtual flash is in maintenance mode, you cannot add or modify a host swap cache. You must first exit maintenance mode on the host before you configure a host swap cache.


  1. Browse to the host in the vSphere Web Client navigator.
  2. Click the Configure tab.
  3. Under Virtual Flash, select Virtual Flash Host Swap Cache Configuration and click Edit.
  4. Select the Enable virtual flash host swap cache check box.
  5. Specify the amount of virtual flash resource to reserve for host swap cache.
  6. Click OK.