Werk #17623: netapp_ontap_cpu: Update cpu utilization calculation method

Component	Checks & agents
Title	netapp_ontap_cpu: Update cpu utilization calculation method
Date	Mar 6, 2025
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.5.0b1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.4.0p5 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.3.0p35 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

For certain Netapp ONTAP versions, the method to calculate the cpu utilization changed.

Instead of

(statistics.processor_utilization_raw/statistics.processor_utilization_base)*100

the calculation becomes

(delta(statistics.processor_utilization_raw)/delta(statistics.processor_utilization_base))*100

According to CONTAP-377586, the affected versions are 9.15.1 to 9.15.1P9 and 9.16.1 to 9.16.1P2.

Since now at least two datapoints are needed for the calculation, the service might become stale while waiting for valid data to come in if you are using one of these versions.

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