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A300/FAS8200 在使用过程中或节点重启后性能突然下降

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Category:
ontap-9
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perf
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适用场景

  • ONTAP 9
  • AFF A300 / FAS8200 

问题描述

  • 使用过程中或 ONTAP 升级和/或重启后性能下降非常严重
  • 性能下降表现为： 
    • CPU 利用率高，大部分来自wafl_exemptCPU 域
    • 所有延迟都来自 CPU 数据刀片
    • 即使操作最少，卷上的延迟也很高
    • 长一致性点 (CP)
    • 来自waffinity查看所有消息的 CPU 运行时间
    • 过长 多个进程的运行时间过长，原因不明
    • 节点启动缓慢（20-30 分钟）

 

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