HotAdd and Hot-Plug are the ability to add vRAM and vCPU to your Virtual Machine without powering it off. The VM instantly adapts to the change, recognizes the newly-added vCPU/vRAM, and makes them usable by your system. Using HotAdd and Hot-Plug you can also add different virtual removable devices to the VMs. Read this blog to know more about VMware Hot add & Hot plug.
