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全体的なCPU使用率が低いにもかかわらず、NFSの書き込みレイテンシが高い

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環境

  • NFS
  • 書き込み負荷が高い
  • FlexGroup

問題

  • NFS書き込みレイテンシが高い
  • 遅延はCPU D-blade / WAFL CPU時間として表示される
  • 全体的なノードのCPU使用率は高くない
  • 一部の書き込みがVOL_LOGアフィニティにスローパスし、理由カウンターにSERIAL_INODENOTMINE_EXCLUSIVEが表示される

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