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高いCPU利用率とパフォーマンスの不均衡アラート

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環境

  • ONTAP 9
  • AFF - A300
  • MGWD
  • ホストOS

問題

  • 1つのノードでパフォーマンスの不均衡に関するアラートが頻繁に発生する

Event: Cluster Load Imbalance Threshold Breached
The performance capacity used counter indicates a load difference of 74% between the nodes on cluster XXX-XXX-XXX and has triggered a WARNING event based on the system threshold of 30%

  • IOPSが低いにもかかわらず常に70%以上のCPU利用率
  • 上位のCPUドメインはホストOSで、主に   top コマンドの出力から取得したmgwdです。 

PID USERNAME    THR PRI NICE   SIZE    RES STATE    C   TIME    WCPU COMMAND

3718 root        345  52    0  2217M  1629M uwait    1    ??? 474.57% mgwd

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