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NetApp Knowledge Base

What is CPU utilization in Data ONTAP: Scheduling and Monitoring?

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Category:
clustered-data-ontap-8
Specialty:
perf
Last Updated:

 

Applies to

  • ONTAP 9
  • Clustered Data ONTAP 8 
  • Data ONTAP 8 7-Mode 
  • Data ONTAP 7 and earlier 

Answer

Note:     

To determine if CPU utilization is a concern, see KB: How do I know if CPU is causing a performance issue?

  • Each storage controller contains one or more multi-core CPUs.
  • These physical CPU cores are the primary compute resource available to Data ONTAP for processing work.
  • In addition to CPU cores, Data ONTAP interacts with other physical hardware such as Ethernet ports, FC ports, disks, and NVRAM.
  • The use of all these physical resources occurs in a highly optimized and parallel manner, taking into account active requests, resource availability, and the overall activity level of the system. 
  • As the interaction between physical resources can be complex and inter-dependent, a measure of CPU being busy (CPU utilization) does not increase linearly with an increase in incoming requests from clients, nor can it be used alone as a measure of the overall system utilization.
  • CPU resources have several unique characteristics thatare useful while analyzing the system

For more detailed information on CPU utilization, see KBs below:

Additional Information

N/A

 

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