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Performance Discrepancy Between QoS Statistics and Qtree Statistics

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Category:
ontap-9
Specialty:
perf
Last Updated:

Applies to

ONTAP 9

Issue

  • The customer observed a discrepancy between the output of the `statistics qtree show` command and the `qos statistics workload characteristics show` command. 
  • The `qos statistics workload characteristics show` command reported significantly higher IOPS compared to the `statistics qtree show` command.

cluster::*>qos statistics workload characteristics show -iterations 0 -workload s5e9975ipdv-wid49299 
Workload            ID     IOPS       Throughput Request Size Read Concurrency 
--------------- ------ -------- ---------------- ------------ ---- ----------- 
-total-              -   356708      1947.77MB/s        5725B   8%         223 
s5e9975ipdv-w..  49299   278082        19.22MB/s          72B   0%         182 

cluster::*>statistics qtree show -interval 5 -iterations 50
                                                    NFS CIFS CSS Internal *Total 
                        Qtree      Vserver Volume   Ops  Ops Ops      Ops    Ops 
----------------------------- ------------ ------ ----- ---- --- -------- ------ 
xxxxxxxxxxxx:vol2/s5e9975lib1 xxxxxxxxxxxx   vol2 22371    0   0        0  22371 
xxxxxxxxxxxx:vol1/s5e9975ipdv xxxxxxxxxxxx   vol1 14891    0   0        0  14891 

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