由于 SMB 调整操作过多而导致的延迟较长
Knowledge Base guidance
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适用场景
- ONTAP 9.5
- ONTAP 9.6
问题描述
- CIFS 延迟极高，尤其是对于 " 其他 " 操作
- 数量众多
ioctl_fsctl_file_level_trim_ops，延迟极高。
::*> 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
- CPU 争用率高，以 WAFL 消息延迟表示。
- 值大于 1 毫秒可能表示 CPU 争用
::*> 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