A.23 Use case of VR measurements for NF

28.5523GPP5G performance measurementsManagement and orchestrationRelease 18TS

In case the NF is virtualized, the performance of an NF may be impacted by the underlying VRs (i.e., virtual CPUs, virtual memories, virtual storages, and connection data volumes). To enable the operator to analyze the impact of the VRs to the performance of the NF, the performance of the virtual compute, virtual memory and virtual disk also needs to be monitored. The usage is the key measurement for the performance of the VR, it can tell whether the VR is overloaded and whether the VR is efficiently utilized. By correlating the VR related measurements with the performance measurement of the NF, the operator can know whether the NF performance issue is caused by the VRs or not. When necessary, the operator may take appropriate action to solve the performance issue of the NF, for example, to scale in/out the VNF instance(s) that realizes the NF, or switch on/off the auto-scaling for the VNF instance(s).