Cannot increase virtual flash swap cache

Products

• VMware vCenter Server
• VMware vSphere ESXi

Issue/Introduction

Symptoms:

• Currently, this issue is affected for the ESXi hosts version 7.x
• Virtual Flash Host Swap Cache cannot be increased, it is grayed out. 
  Example:
  
• Virtual resource management is set correctly and capacity is assigned with free space available
  
  

Environment

VMware vSphere ESXi 7.0.x
VMware vCenter Server 7.0.x

Cause

Virtual flash host swap cache cannot be increased

Resolution

The issue is fixed in vCenter 7.0U3 version. 

Workaround:

• Open the vCenter mob page:
  • https://<VC_IP>/mob/?moid=vFlashManager-host<ID>&method=configureHostVFlashCache
    • The host-<ID> is displayed in the browser's address bar once the host is selected. 
• Then invoke the command with the following spec and change `some_value` to the desired value vFlash swap cache value in GB:
  

  <spec>
  <defaultVFlashModule>vfc</defaultVFlashModule>
  <swapCacheReservationInGB>some_value</swapCacheReservationInGB>
  </spec>