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High Disk latency on the Azure CVO after adding disk to the aggregate

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Category:
ontap-9
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Perf
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Applies to

  • ONTAP
  • CVO

Issue

  • High read latency is seen from the disk layer when the data is read from the disk.

Cluster1::*> qos statistics volume latency show -vserver SVM1 -volume volume1

Workload ID Latency Network Cluster Data Disk QoS Max QoS Min NVRAM Cloud FlexCache SM Sync VA

--------------- ------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------

Volume1 14669 2.40ms 48.00us 0ms 79.00us 2.27ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms

Volume1 14669 2.66s 94.00us 0ms 2.08ms 2.61s 0ms 0ms 0ms 2.24ms 0ms 0ms 0ms

Volume1 14669 99.00ms 57.00us 0ms 2.80ms 91.45ms 0ms 0ms 0ms 4.30ms 0ms 0ms 0ms

Volume1 14669 10.07ms 53.00us 0ms 1299.00us 8.72ms 0ms 0ms 0ms 2.10ms 0ms 0ms 0ms

 

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