High CPU Utilization in Ontap 9, FAS and AFF may be seen due to user workload or expected background workload. Know how to alleviate CPU utilization by reducing workload or understanding that high CPU...High CPU Utilization in Ontap 9, FAS and AFF may be seen due to user workload or expected background workload. Know how to alleviate CPU utilization by reducing workload or understanding that high CPU is utilizing spare background cycles and will yield to user workloads.