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CPU over-subscription leads to QoS minimum latency and user slowness

Last Updated:

Applies to

ONTAP 9.7+


QoS latency is observed for workloads utilizing QoS floors or adaptive QoS and the nodes hosting the workloads are experiencing a CPU bottleneck.
To check if a node is experiencing a CPU bottleneck, the following command can be used:
cluster::> system node run -node -command sysstat -x 1
To check if the latency is due to QoS minimums, the following command can be used:
cluster::> qos statistics volume latency show -volume VOLUME_NAME -vserver VSERVER_NAME
The majority of latency will be observed under the column labeled Qos Min


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