High CPU utilization in HOST domain

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Visibility:: Public

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Category:: data-ontap-8

Specialty:: perf

Last Updated:

Applies to

ONTAP 8.2 or newer

Issue

High CPU on one node.
Running sysstat -M shows high host domain utilization compared to other domains:

ANY1+ ANY2+ ANY3+ ANY4+ ANY5+ ANY6+ ANY7+ ANY8+ AVG CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 CPU6 CPU7 Nwk_Excl Nwk_Lg Nwk_Exmpt Protocol Cluster Storage Raid Raid_Ex Target Kahuna WAFL_Ex(Kahu) WAFL_XClean SM_Exempt Cifs Exempt SSAN_Ex Intr Host Ops/s CP 100% 100% 98% 97% 93% 87% 76% 63% 89% 89% 91% 91% 91% 90% 88% 86% 87% 4% 7% 45% 0% 0% 6% 2% 6% 5% 42% 52%( 35%) 0% 0% 0% 9% 9% 6% 520% 6571 0%

Note: This is not related to slowness as CPU usage is always a symptom, but without a problem is not good or bad, it just is there. If unsure, Please contact NetApp Technical Support and reference this article for further assistance.