由于锁定导致的高网络处理（CPU N-blade）延迟和性能下降

适用于

• ONTAP 9.6及更高版本
• NFSv4

问题描述

• 在 qos statistics volume latency show 的网络列中看到高延迟
• 出现高锁定倒带
  • 锁定打开所有者特定于 NFSv4

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::*>