Possible in vmware to add additional CPUs https://blogs.vmware.com/performance/2019/12/cpu-hot-add-performance-vsphere67.html https://blogs.vmware.com/performan

Possible in vmware to add additional CPUs https://blogs.vmware.com/performance/2019/12/cpu-hot-add-performance-vsphere67.html https://blogs.vmware.com/performance/2019/12/cpu-hot-add-per... However we kind of moved on to disposable servers which can be scaled on demand. In which case you just add additional servers or adjust server type depending on requirements. Same with containers. The need to add RAM or CPU to a running instance was from the time you used to have a singe long living instance serving an application.