weizhouapache commented on issue #6865:
URL: https://github.com/apache/cloudstack/issues/6865#issuecomment-1385076840
@1450793561
as @DaanHoogland mentioned, this is a known limitation, introduced by #4878
the UI change was introduced in #5923
```
if (vmHypervisorType.equals(HypervisorType.KVM) &&
!currentServiceOffering.isDynamic()) {
String message = String.format("Unable to live scale VM on KVM
when current service offering is a \"Fixed Offering\". KVM needs the tag
\"maxMemory\" to live scale and it is only configured when VM is deployed with
a custom service offering and \"Dynamic Scalable\" is enabled.");
s_logger.info(message);
throw new InvalidParameterValueException(message);
```
maybe @GutoVeronezi can have a look to see if it is possible to improve it
in the future.
for example, scale a running vm on kvm from a fixed offering to another
fixed offering
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