It's possible Memory hot remove or CPU

[brienjms]

In most of the blogs i have read that hot add is possible in new versions of OS. But not hot remove.

[daphnissov · Accepted solution]

New(ish) versions of the Linux kernel support hot CPU remove, but no OS type (to my knowledge) supports hot memory remove.

[diegodco31]

Hi

Check the following article:https://www.altaro.com/vmware/vmware-hot-add/