メインコンテンツまでスキップ

SMB の過剰なトリム操作による高レイテンシ

Views:
151
Visibility:
Public
Votes:
0
Category:
ontap-9
Specialty:
perf
Last Updated:

環境

  • ONTAP 9.5 
  • ONTAP 9.6

問題

  • 特に「その他」の処理の場合、 CIFS のレイテンシが非常に高くなります
  • ioctl_fsctl_file_level_trim_opsの数が多く、レイテンシが非常に高くなっています。
 ::*> statistics show-periodic -object smb2 -instance svmtest -counter ioctl_fsctl_file_level_trim_ops|ioctl_fsctl_file_level_trim_latency cluster: smb2.svmtest: 10/19/2020 15:23:25 ioctl_fsctl_file_level ioctl_fsctl_file_level trim trim latency ops ---------------------- ---------------------- 50854.31us 1385.47 52302.41us 1318.84 53776.76us 1484.94 55285.58us 1387.76 56934.23us 1323.12 
  • WAFL メッセージのレイテンシで示される CPU 競合が高くなります。 
    • 1 ミリ秒を超える値は、 CPU の競合を示している可能性があります 
 ::*> statistics show-periodic -object wafl -counter avg_wafl_msg_latency -node node_1 -instance wafl cluster1: wafl.wafl: 10/16/2020 18:25:28 avg_wafl msg Complete Number of latency Aggregation Constituents -------- ----------- ------------ 14.91ms n/a n/a 23.25ms n/a n/a 19.72ms n/a n/a 17.34ms n/a n/a 19.09ms n/a n/a 

 

Sign in to view the entire content of this KB article.

New to NetApp?

Learn more about our award-winning Support

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.

 

  • この記事は役に立ちましたか?