Error "This type of vm is not supported when software memory tiering is enabled" is shown when powering on a virtual machine.

Products

• VMware vSphere ESXi 8.0

Issue/Introduction

After configuring memory tiering in a vSphere environment, powering on a VM results in the following error:

This type of VM is not supported when software memory tiering is enabled. Failed to start the virtual machine. Module MemSchedEarly power on failed. An error occurred while parsing scheduler specific configuration parameters.

Environment

ESXi 9.0 hosts using memory tiering.

Cause

There are several virtual machine parameters that are disallowed when running on a host with memory tiering enabled. Reference the table below for these unsupported settings.

VM Profile	VMX Options
Low latency VM	sched.cpu.latencySensitivity = "high"
Security VM	SEV VM: sev.enable = "True" SGX VM: sgxInfo.epcSize is non-zero TDX VM: tdx.enable = "True"
Fault Tolerant VM	ftcpt.enabled = "True"
Monster VM	VMs with more than 1 TB Memory and 128 vCPUs
Nested Virtualization VM	vhv.enable = "True"

Resolution

Change or disable the unsupported parameters on the virtual machine. 

Additional Information

These constraints are planned to be removed in a future release.