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CONTAP-229260:オールSANアレイのCPU使用率が高いため書き込み処理が大量に発生する

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Category:
ontap-9
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perf
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問題

  • LUNまたはボリュームでの書き込みワークロードの増加
  • レイテンシは目立ちますが、
  • [*> node run -node <node_name>-command "priv set diag;sysstat -x"] reveals:
  • CPU 100%
  • 列:[CP_Ty]とマークされています。B(Back-to-Back Consistency Points)
  • [*> node run -node <node_name>-command "priv set diag;sysstat -M 1"] reveals high [NWK_exempt]
  • プラットフォームはオールSANアレイ(ASA)
  • All Flesh FAS(AFF)で同様のワークロードの動作が異なるように見える

 

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