Manually change (lower) CVM Memory in a Nutanix AHV-Cluster

First check, that everything is fine in your cluster.

To manually change the amount of Memory of CVM, first logon to the CVM and shutdown the CVM via the cvm_shutdown script:

cvm_shutdown -P

Then logon to the correspondig AHV Host and list all VMs:

virsh list --all

Check, that you see your CVM powered off

then continue to change the Memory config:

virsh setmem <CVM_NAME> <Gigabytes>G --config

virsh setmaxmem <CVM_NAME> <Gigabytes>G --config

Example: virsh setmem NTNX-CVM1 36G --config

You can check if this succeeded:

virsh dominfo <CVM_NAME>

then you can power on the CVM again:

virsh start <CVM_NAME>

Wait for the CVM to come up and go to the GUI and wait for everything gettin normal (especially the Data Resiliency Status should change back to OK).

After everything is ok, you can continue with the next CVM.