We are planning to move HDF nodes from some non hdf nifi instances befor moving we just want to calculate the current utilzation of utilization of Nifi (non HDF). for better planning.
How to get that stats for example for last 1day nifi how much mem/cores used?
NiFi does not monitor the servers memory and CPU load over any period of time. It will present you with the current cpu and heap load at any given moment of time, but that information is not logged or stored anywhere for future consumption.
You would need to setup some external monitor that would track CPU and memory usage over time so you can look for spikes on the srevers where the NiFi service is running.