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由于 QoS 限制, Nwk_waiderc CPU 占用率较高

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9
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Category:
ontap-9
Specialty:
perf
Last Updated:

适用场景

  • ONTAP 9.8P3 或更低版本
  • ONTAP 9.7 或更低版本

问题描述

  • nwk_exempt 在对抢占资源的工作负载启用 QoS 限制后, CPU 利用率提高 2 ~ 3 倍
  • 平均 CPU 或 cpu_busy 更高,这与启用 QoS 限制的效果相反
    • wafl_exempt由于 IOPS 受到限制,以及许多其他域的 CPU 占用率会下降
    • 但是,这不能抵消 nwk_exempt CPU 域中 CPU 利用率的增加
  • nwk_exempt 低端平台上的高 CPU 利用率最终可能会导致网络 CPU 饱和,从而影响其他卷的延迟
    • 延迟自 Cluster Interconnect
    • 延迟自 CPU N-blade(Network)

 

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