Monitor CPU usage using Splunk App for Infrastructure

There are multiple CPU metrics that provide insight into how your infrastructure is performing. CPU utilization metrics indicate the following:

• If a system is being over-utilized: If your system is being over-utilized, it does not have enough capacity for the CPU demand. A high cpu system, cpu user and low cpu.idle measurements indicate over-utilization.
• If a system is being under-utilized: Your system is expected to handle consistent workloads, but a high cpu.idle, low cpu.system and cpu.user measurements indicate under-utilization.
• Is disk I/O causing a bottleneck? A high cpu.wait measurement indicates that the CPU is unable to move on because it is waiting for a disk operation to finish.

A single Linux host is a server or entity. A group of Linux hosts is a logical clustering of entities based on a data center, operating system, or tier of infrastructure so that you can monitor them in aggregate.

Steps

Step 1: View your entities

1. Click the Investigate tab. The Investigate view displays the entities you have added. You can select to view your entities using the Infrastructure Overview (tile view) or List View.

Step 2: Explore Entities in the Entity Analysis Workspace

1. Click the Entities button.
2. Click the Entity Name for the host you want to explore. The Analysis Workspace displays.
3. Under Metrics, click cpu. This menu tree contains metrics used to analyze your system.
• Click user. A cpu:user chart is added to the workspace.
• Click system. A cpu:system chart is added to the workspace.

Step 3: View per CPU breakdown

1. In the workspace menu bar, select Split all by….
2. Select cpu. This enables monitoring cpu usage per core for all your charts.

Step 4: Pinpoint a specific timerange to investigate

1. Drag over an area of the chart to pinpoint a time range to investigate.

Summary

You now have a workspace that monitors your cpu usage for your single Linux hosts. On your workspace, you can also:

• Create alerts to notify you when conditions for critical issues are met. Admin privileges required to configure and manage alerts.
• Select the time period you want to display, from the last 15 minutes to the last 30 days.
• Use advanced aggregation and filtering options available in the Analysis panel.
• Select to view your charts by grid layout or stack layout
• Click the refresh button to refresh the screen.