// Module included in the following assemblies:
//
// * nodes/nodes-dashboard-using.adoc

:_mod-docs-content-type: CONCEPT
[id="nodes-dashboard-using-identify_{context}"]
= Identify metrics for indicating optimal node resource usage

[role="_abstract"]
To diagnose and troubleshoot scaling issues, you can use the node metrics dashboard to review metrics across four categories: *Critical*, *Outliers*, *Average durations*, and *Number of Operations*. 

The metrics in the *Critical* category help you indicate optimal node resource usage. These metrics include:

* Top 3 containers with the most OOM kills in the last day
* Failure rate for image pulls in the last hour
* Nodes with system reserved memory utilization > 80%
* Nodes with Kubelet system reserved memory utilization > 50%
* Nodes with CRI-O system reserved memory utilization > 50%
* Nodes with system reserved CPU utilization > 80%
* Nodes with Kubelet system reserved CPU utilization > 50%
* Nodes with CRI-O system reserved CPU utilization > 50%
