Managing Processes and Tuned Profiles on RHEL 8

30 minutes
  • 3 Learning Objectives

About this Hands-on Lab

A Linux system is a collection of processes, and process management is a critical skill for system administrators. In this hands-on lab, we will examine process management. We will identify CPU/memory intensive processes and will kill those processes. And, we will also examine how to optimize system and process performance by adjusting process scheduling on RHEL 8.

The Tuned service is an intelligent application that uses system monitoring to optimize system performance for specific types of workloads. The heart of Tuned are profiles, which are customized for a variety of use cases. In this hands-on lab, we will examine Tuned and how to manage Tuned profiles.

**Red Hat Exam Requirements Covered:**
– Identify CPU/memory intensive processes and kill processes
– Adjust process scheduling
– Manage tuning profiles

Learning Objectives

Successfully complete this lab by achieving the following learning objectives:

Identify CPU/Memory Intensive Processes and Kill Processes
  • Query the system’s overall performance with top
  • Install and use iotop to see storage performance
  • Set up and use a monitoring display with screen
  • View and alter running process priorities
  • Start processes with altered priorities
  • Query and kill processes
Adjust Process Scheduling
  • Determine a processes scheduling policy settings
  • Alter a running processes scheduling settings
  • Start a process with specific scheduling settings
Manage Tuning Profiles
  • Query the current Tuned profile and settings
  • Set different profiles and verify they are active
  • Set multiple complementary profiles and query them
  • View the differences between similar profiles
  • Modify the service configuration file and restart the daemon

Additional Resources

In this lab, you'll be working as a system administrator who wants to discover your system's current performance characteristics and alter process priorities and scheduling options to affect system performance.

First, you'll query your system using standard utilities that show an overview of the system's state. Next, you'll set up a monitoring display and use nice, renice and the top command to alter the priority of running processes, as well as start processes with altered priority.

Then, you'll query processes for their scheduling settings, change the settings on running processes, and also start processes with non-default scheduling settings.

Lastly, you'll investigate system performance tuning using Tuned and it's profiles, understand what happens when a switch is made, and then change some important daemon-level settings that affect the entire tuned process and environment.

What are Hands-on Labs

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.

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