Tuning a System with Tuned

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Tuning a System with Tuned

In this hands-on lab, you will be using `Tuned` to monitor and optimize the performance of a lab system. As part of the lab, you will view a list of available profiles using `tuned-adm`. This same command displays the recommended profile for the lab system and will follow up by showing the currently active profile. For the final part of the lab, you will create a custom `Tuned` profile based on a template. You will modify the custom profile, enable select values, add some system settings, and finally add a custom script. *This course is not approved or sponsored by Red Hat.*

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Lab Info

Level

Advanced

Last updated

Sep 17, 2025

Duration

45m

Challenge

Review `tuned` Profiles
1. List available tuned profiles.
2. Run the appropriate tuned command to view the recommended profile.
3. Execute the appropriate tuned command to display the active profile.
4. View the tuned.conf file for the active profile.
Challenge

Check Current System Configuration Details
1. Use sysctl to check the IPv4 and IPv6 forwarding values.
2. Check the /tmp directory for a tuned.txt log.
3. Launch PowerTOP to review the recommended tunables.
  
  Review the list of entries under the Tunables tab.
Challenge

Create a Custom `tuned` Profile
1. Create a custom profile directory called it_profile.
  
  The profile will be created in the /etc/tuned directory.
2. Copy the configuration files provided by the senior architect into the new directory.
  
  The source directory for the files is ~/scripts/pt_profile/.
3. Edit the configuration file, making the following changes.
  
  In the [sysctl] section, enable IPv4 and IPv6 forwarding: net.ipv4.conf.all.forwarding = 1 net.ipv6.conf.all.forwarding = 1
  
  In the [sysfs] section, enable the first 2 entries:
  
  Runtime PM for I2C Adapter i2c-0 (SMBus PIIX4 adapter at b100)
  
  Runtime PM for PCI Device Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II]
  
  At the end of the file, add a [script] section and call the tuned.sh script from the cloud_user's scripts directory: script=/home/cloud_user/scripts/tuned.sh
Challenge

Enable and Validate the Custom Profile
1. Using the appropriate tuned command, enable the profile.
2. Verify the profile has been loaded and settings applied using the appropriate tuned command.
3. Validate the changes on the system.
  
  Confirm IPv4 and IPv6 forwarding has been enabled.
  
  Check the /tmp directory to determine if a tuned.txt log file was created.
  
  Launch PowerTOP, check the Tunables tab and confirm the I2C Adapter and PCI Device values have been corrected.
Challenge

Reboot the Lab and Confirm Changes Persist
1. Verify the custom profile is active.
2. Confirm IPv4 and IPv6 forwarding are still enabled.
3. Check the /tmp directory to determine if a tuned.txt log file was created.
4. Launch PowerTOP, check the Tunables tab, and confirm the I2C Adapter and PCI Device values are still corrected.

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