RHEL 10 – tuned profile not applied after reboot leading to performance regression – Fix & Prevention

📖 ~1 min read

Table of contents

1. Symptom & Impact
2. Environment & Reproduction
3. Root Cause Analysis
4. Quick Triage
5. Step-by-Step Diagnosis
6. Solution – Primary Fix
7. Solution – Alternative Approaches
8. Verification & Acceptance Criteria
9. Rollback Plan
10. Prevention & Hardening
11. Related Errors & Cross-Refs
12. References & Further Reading

Symptom & Impact

Workloads show lower throughput and higher latency after host restarts.

Environment & Reproduction

Occurs when tuned service is disabled or profile assignment is overwritten.

tuned-adm active
systemctl status tuned
cat /etc/tuned/active_profile

Root Cause Analysis

Service disablement, missing tuned package, or conflicting profile scripts prevent intended tuning.

Quick Triage

Check profile state and service startup behavior.

tuned-adm list
systemctl is-enabled tuned
journalctl -u tuned -n 50

Step-by-Step Diagnosis

Validate selected profile and effective kernel/sysctl values.

tuned-adm verify
sysctl vm.swappiness
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

Solution – Primary Fix

Enable tuned and apply approved profile persistently.

dnf install -y tuned
systemctl enable --now tuned
tuned-adm profile throughput-performance

Solution – Alternative Approaches

Use custom tuned profile layered on base template for specific workloads.

mkdir -p /etc/tuned/custom
cp -a /usr/lib/tuned/throughput-performance/* /etc/tuned/custom/
tuned-adm profile custom

Verification & Acceptance Criteria

Profile remains active after reboot and expected tunables are in effect.

tuned-adm active
reboot
tuned-adm active

Rollback Plan

Switch back to prior profile if workload behavior worsens.

tuned-adm profile balanced
systemctl restart tuned

Prevention & Hardening

Track profile drift and validate tuned state in post-boot checks.

systemctl status tuned
tuned-adm recommend

Related Errors & Cross-Refs

Related to cpupower overrides and container runtime cgroup tuning mismatches.

Related tutorial: View the step-by-step tutorial for rhel-10.

View all rhel-10 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

RHEL tuned profile documentation and performance tuning guide.