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qos statistics performance show

Display system performance data per QoS policy group

Availability: This command is available to cluster administrators at the admin privilege level.

Description​

The qos statistics performance show command shows the current system performance levels that QoS policy groups are achieving.

The command displays the following data:

  • The QoS policy group name (Policy Group)
  • Input/output operations performed per second (IOPS)
  • Throughput in kilobytes per second (KB/s) or megabytes per second (MB/s) as appropriate (Throughput)
  • Latency observed per request in microseconds (us) or milliseconds (ms) as appropriate (Latency)
The results displayed per iteration are sorted by IOPS. Each iteration starts with a row that displays the total IOPS used across all QoS policy groups. Other columns in this row are either totals or averages.

Parameters​

[-node {<nodename>|local}] - Node
Selects the policy groups that match this parameter value. If you do not specify this parameter, the command displays data for the entire cluster.
[-iterations <integer>] - Number of Iterations
Specifies the number of times the display is refreshed before terminating. If you do not specify this parameter, the command iterates until interrupted by Ctrl-C.
{ [-rows <integer>] - Number of Rows in the Output
Specifies the number of busiest QoS policy groups to display. Valid values are from 1 to 20. The default value is 10.
| [-policy-group <text>] - QoS Policy Group Name
Selects the QoS policy group whose name matches the specified value. If you do not specify this parameter, the command displays data for all QoS policy groups.
| [-adaptive-policy-group <text>]} - Adaptive QoS Policy Group Name
Selects the QoS adaptive policy group whose name matches the specified value. If you do not specify this parameter, the command displays data for all QoS policy groups.
[-refresh-display {true|false}] - Toggle Screen Refresh Between Each Iteration
Specifies the display style. If true, the command clears the display after each data iteration. If false, the command displays each data iteration below the previous one. The default is false.

Examples​

    cluster1::> qos statistics performance show -iterations 100 -rows 4
Policy Group             IOPS      Throughput    Latency Is Adaptive? Is Shared?
-------------------- -------- --------------- ---------- ------------ ----------
-total-                    51        10.47KB/s        0ms - -
_System-Work               51        1.47KB/s        0ms false true
-total-                    46        10.72KB/s        0ms - -
_System-Work               46        1.72KB/s        0ms false true
-total-                  2344       68.44KB/s    10.00us - -
_System-Work             2344       68.44KB/s    10.00us false true
-total-                    28           0KB/s        0ms - -
_System-Work               28           0KB/s        0ms false true
-total-                    27           0KB/s        0ms - -
_System-Work               27           0KB/s        0ms false true
-total-                    72           0KB/s    55.00us - -
_System-Work               72           0KB/s    55.00us false true
-total-                   401       15.23KB/s    59.00us - -
_System-Work              401       15.23KB/s    59.00us false true
The example above displays the system performance for the 4 QoS policy groups with the highest IOPS and it refreshes the display 100 times before terminating.
cluster1::> qos statistics performance show -iterations 100 -policy-group pg1
qos statistics performance show -iterations 100 -policy-group _System-Work
Policy Group             IOPS      Throughput    Latency Is Adaptive? Is Shared?
-------------------- -------- --------------- ---------- ------------ ----------
-total-                    48           10KB/s        0ms - -
_System-Work               48           0KB/s        0ms false true
-total-                    50           10KB/s        0ms - -
_System-Work               50           0KB/s        0ms false true
-total-                    40       10.23KB/s        0ms - -
_System-Work               40       10.23KB/s        0ms false true
-total-                    45           10KB/s        0ms - -
_System-Work               45           0KB/s        0ms false true
-total-                    45           20KB/s        0ms - -
_System-Work               45           0KB/s        0ms false true
-total-                    34           0KB/s        0ms - -