application commands
qos statistics latency show
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Display latency breakdown data per QoS policy group
Availability: This command is available to cluster administrators at the admin privilege level.
Description
The qos statistics latency show command displays the average latencies for QoS policy groups across the various Data ONTAP subsystems.
The command displays the following data:
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The QoS policy group name (Policy Group)
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Total latency observed per I/O operation (Latency)
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Latency observed per I/O operation in the Network subsystem (Network)
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Latency observed per I/O operation across the internally connected nodes in a Cluster (Cluster)
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Latency observed per I/O operation in the Data management subsystem (Data)
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Latency observed per I/O operation in the Storage subsystem (Disk)
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Latency observed per I/O operation for QoS Policy Group Ceiling (QoS Max)
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Latency observed per I/O operation for QoS Policy Group Floor (QoS Min)
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Latency observed per I/O operation for NVRAM transfer (NVRAM)
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Latency observed per I/O operation for Object Store (Cloud) operations
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Latency observed per I/O operation for FlexCache (FlexCache) operations
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Latency observed per I/O operation for Synchronous Snapmirror (SM Sync) operations
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Latency observed per I/O operation for Volume Activation (VA) operations
The results displayed per iteration are sorted by the Latency field. Each iteration starts with a row that displays the average latency, in microseconds (us) or milliseconds (ms), observed across all QoS policy groups.
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.
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[-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.
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[-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 latency show -iterations 100 -rows 3 Policy Group Latency Network Cluster Data Disk QoS Max QoS Min NVRAM Cloud FlexCache SM Sync VA -------------------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- -total- 110.35ms 110.02ms 0ms 327.00us 0ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms vs1vol0 167.82ms 167.22ms 0ms 603.00us 0ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms vol1 117.76ms 117.56ms 0ms 191.00us 0ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms vol2 44.24ms 44.05ms 0ms 190.00us 0ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms -total- 38.89ms 38.63ms 0ms 256.00us 0ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms vol2 64.47ms 64.20ms 0ms 266.00us 0ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms vol1 27.28ms 27.03ms 0ms 253.00us 0ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms vs1vol0 23.72ms 23.47ms 0ms 249.00us 0ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms -total- 409.81ms 409.65ms 0ms 169.00us 0ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms vol1 816.92ms 816.80ms 0ms 120.00us 0ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms vol2 407.88ms 407.66ms 0ms 219.00us 0ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms vs1vol0 3.68ms 3.49ms 0ms 193.00us 0ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms -total- 1169.00us 107.00us 0ms 1062.00us 0ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms vol2 1169.00us 107.00us 0ms 1062.00us 0ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms
The example above displays latencies for the 3 QoS policy groups with the highest latencies and refreshes the display 100 times before terminating.
cluster1::> qos statistics latency show -iterations 100 -policy-group pg1 Policy Group Latency Network Cluster Data Disk QoS Max QoS Min NVRAM Cloud FlexCache SM Sync VA -------------------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- -total- 5.88ms 308.00us 0ms 434.00us 5.14ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms pg1 5.88ms 308.00us 0ms 434.00us 5.14ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms -total- 4.17ms 280.00us 0ms 477.00us 3.42ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms pg1 4.17ms 280.00us 0ms 477.00us 3.42ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms -total- 4.43ms 274.00us 0ms 656.00us 3.50ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms pg1 4.43ms 274.00us 0ms 656.00us 3.50ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms -total- 4.89ms 276.00us 0ms 699.00us 3.92ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms pg1 4.89ms 276.00us 0ms 699.00us 3.92ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms
The example above displays latencies for the QoS policy group pg1 and refreshes the display 100 times before terminating.