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高ネットワーク処理(CPU Nブレード)のレイテンシとロックによるパフォーマンスの低下

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Category:
ontap-9
Specialty:
nas<a>2008926063</a>
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環境

  • ONTAP 9.6 以降
  • NFSv4

問題

  • の Network 列には、高いレイテンシが表示されます qos statistics volume latency show
  • 高いロッキング巻き戻しが見られる
Cluster::> set diag Cluster::*> statistics start -object rw_ctx -counter nfs_rewinds <wait 1 hour> Cluster::*> statistics show -object rw_ctx -counter nfs_rewinds -value >1 Object: rw_ctx Instance: rw_ctx Start-time: 10/1/2021 21:37:16 End-time: 10/1/2021 22:37:16 Scope: node1 Counter Value -------------------------------- -------------------------------- nfs_rewinds - Lock Open Owner 229597544 <--over 60,000 per second Lock Open State 18610 Cluster::*> 

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