RHCSA Practical Lab Series – System Performance Tuning

🔍 Lab 21: Configuring System Performance Optimization with tuned

📌 Objective

In this lab, you will:
✔ Install and configure the tuned performance tuning service
✔ Enable and restart the tuned service
✔ Identify the current active tuning profile
✔ Apply the recommended performance profile

📌 Step 1: Install the tuned Package

🔹 Ensure tuned is installed:

[root@node2 ~]# yum -y install tuned

✅ Expected Output:

Installed: tuned-2.19.0-1.el9.x86_64

📌 Step 2: Enable and Start tuned Service

🔹 Enable tuned to start on boot:

[root@node2 ~]# systemctl enable tuned

🔹 Start or restart tuned service:

[root@node2 ~]# systemctl restart tuned

🔹 Verify the service status:

[root@node2 ~]# systemctl status tuned

✅ Expected Output:

● tuned.service - Dynamic system tuning daemon
   Loaded: loaded (/usr/lib/systemd/system/tuned.service; enabled; vendor preset: enabled)
   Active: active (running)

📌 Step 3: Check Active Performance Profile

🔹 Display the currently active profile:

[root@node2 ~]# tuned-adm active

✅ Example Output:

Current active profile: balanced

🔹 List all available tuning profiles:

[root@node2 ~]# tuned-adm list

✅ Example Output:

Available profiles:
- balanced
- desktop
- latency-performance
- network-latency
- network-throughput
- virtual-guest
- virtual-host

📌 Step 4: Apply the Recommended Profile

🔹 Find the best recommended profile for your system:

[root@node2 ~]# tuned-adm recommend

✅ Example Output:

virtual-guest

📌 The system suggests using the virtual-guest profile for optimization.

📌 Step 5: Apply the Recommended Profile

🔹 Apply the suggested profile (e.g., virtual-guest):

[root@node2 ~]# tuned-adm profile virtual-guest

🔹 Verify the profile is active:

[root@node2 ~]# tuned-adm active

✅ Expected Output:

Current active profile: virtual-guest

📌 Step 6: Verify the Performance Tuning Configuration

🔹 Check if tuned is running after reboot:

[root@node2 ~]# reboot

🔹 After reboot, verify tuned is still enabled and active:

[root@node2 ~]# systemctl status tuned
[root@node2 ~]# tuned-adm active

✅ Ensure the profile remains virtual-guest.

📌 Troubleshooting Tips

🔹 If tuned fails to start, reinstall the package:

[root@node2 ~]# yum reinstall tuned -y

🔹 To revert to the default profile (balanced):

[root@node2 ~]# tuned-adm profile balanced

🔹 To manually test the effect of a profile change:

[root@node2 ~]# tuned-adm verify

✅ Final Summary

✔ Installed and started the tuned performance tuning service
✔ Identified the active profile and recommended profile
✔ Applied the virtual-guest profile
✔ Ensured changes persist after reboot

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