This little blogpost will explain howto change the CVM memory size in Nutanix Community Edition. I assume you are here because you got an error similar to this:
As you can see the CVM has to much memory assigned and can’t start on the node. To change this we need to edit CVM parameter file. Type: virsh edit
When you are in the editor type the “i” button to switch to insert mode. Now you can change the file. Change the values in red to 20971520 (CVM will get 20GB memory).
When ready type ESCAPE and the “:wq” (without the “”). This will save the file.
Type: virsh dominfo