Keep in the mind, spikes of high CPU utilization on the Cisco Nexus is a normal activity. Viewing the CPU history is valuable when correlating a network event with the past CPU utilization.Cisco NX-OS takes advantage of CPU multitasking, so processes can take advantage of an idle CPU to complete tasks faster. Therefore the show process cpu history command might display CPU spikes that are not necessarily a problem.
Additional investigation is required if the average CPU remains close to 100%. If you have a logging level setting, such as 6, many messages are generated and performance can be impacted, try change the logging level on the chassis check if your system performance is significantly slower or non responsive if YES raise a TAC with Cisco to additional investigation
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Cheers Bruno Rangel Please remember to rate helpful responses using the star bellow and identify helpful or correct answers