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在A300/FAS8200上重新启动节点或升级ONTAP后、性能会受到很大影响

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ontap-9
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perf
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适用场景

  • ONTAP 9
  • AFF A300/FAS8200 

问题描述

  • ONTAP 升级和/或重新启动后、性能会大幅下降
  • 性能下降的原因如下： 
    • CPU利用率较高、 其中大部分来自 wafl_exempt CPU域
    • 所有延迟都来自CPU数据刀片
    • 即使操作极少、卷也会出现高延迟
    • 长一致点(CP)
    • 从 waffinity 所有消息的CPU上的视图高运行时间
    • 多个进程的运行时间过长、无法解释
    • 节点启动缓慢(20到30分钟)

 

 

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