2017-08-03 02:44 PM - edited 2017-08-03 02:45 PM
ONTAP Recipes: Did you know you can…?
Easily identify remaining performance capacity
Performance capacity, or headroom, measures how much work you can place on a node or an aggregate before performance of workloads on the resource begins to be affected by latency. Knowing the available performance capacity on the cluster helps you provision and balance workloads.
1. Change to advanced privilege level:
set -privilege advanced
2. Start real-time headroom statistics collection:
statistics start –object [resource_headroom_cpu | resource_headroom_aggr]
3. Display real-time headroom statistics information:
statistics show - object [resource_headroom_cpu | resource_headroom_aggr]
For complete command syntax, see the man page.
Cluster1::*> statistics show -object resource_headroom_cpu -raw -counter ewma_hourly
Start-time: 7/9/2017 16:06:27
End-time: 7/9/2017 16:06:27
You can compute the available performance capacity for a node by subtracting the optimal_point_utilization counter from the current_utilization counter. In this example, the utilization capacity for CPU_node1 is -14% (72%-86%), which suggests that the CPU has been overutilized on average for the past hour.
For more information, see the ONTAP 9 documentation center