🟡 Medium   ⏱ 5–30 min  Last verified: 20 May 2026
Affected versions: Oracle Linux 10

📖 ~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

CPU scheduling and I/O tuning revert after reboot, degrading throughput and latency SLAs.

Environment & Reproduction

Happens when tuned is disabled or profile selection was not persisted.

tuned-adm active
systemctl status tuned
reboot

Root Cause Analysis

Service enablement and profile metadata are not aligned, so defaults are restored at startup.

Quick Triage

Check daemon state and active recommendation.

systemctl is-enabled tuned
tuned-adm recommend
journalctl -u tuned -n 40 --no-pager

Step-by-Step Diagnosis

Review profile files and applied sysctl effects.

grep -R . /etc/tuned/ /usr/lib/tuned/ -n | head -n 60
sysctl -a | grep -E 'vm.dirty_ratio|kernel.sched' | head
Illustrative mockup for oracle-linux-10 — terminal_or_shell
Checking active tuned profile — Illustrative mockup — Progressive Robot

Solution – Primary Fix

Enable tuned and set explicit profile.

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sudo systemctl enable --now tuned
sudo tuned-adm profile throughput-performance
tuned-adm active
Illustrative mockup for oracle-linux-10 — log_or_config
Enabling tuned persistence and selecting profile — Illustrative mockup — Progressive Robot

Solution – Alternative Approaches

Use custom derived profile for mixed workload systems.

sudo mkdir -p /etc/tuned/custom-prod
sudo cp -r /usr/lib/tuned/throughput-performance/* /etc/tuned/custom-prod/
sudo tuned-adm profile custom-prod

Verification & Acceptance Criteria

Desired profile remains active across reboot cycles.

reboot
tuned-adm active
systemctl status tuned

Rollback Plan

Switch back to baseline profile if workload behavior worsens.

sudo tuned-adm profile balanced
sudo systemctl restart tuned

Prevention & Hardening

Capture profile state in host inventory and validate post-maintenance.

tuned-adm list
tuned-adm active

Related to manual sysctl drift and conflicting performance tools.

Related tutorial: View the step-by-step tutorial for oracle-linux-10.

View all oracle-linux-10 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

RHEL performance tuning and tuned profile documentation.

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