CentOS Stream 9 – Common Problem 235 – Diagnosis and Fix

📖 ~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

journald drops messages under load

Environment & Reproduction

Persistent journal nearly full or rate limiting hit on CS9.

Root Cause Analysis

SystemMaxUse exceeded or RateLimitBurst triggered.

Quick Triage

journalctl –disk-usage and check /etc/systemd/journald.conf.

Step-by-Step Diagnosis

Run: journalctl –disk-usage; journalctl –verify; systemctl status systemd-journald.

Solution – Primary Fix

Set SystemMaxUse=2G and RateLimitBurst=20000 in /etc/systemd/journald.conf.d/00-local.conf.

Solution – Alternative Approaches

Forward to remote syslog with systemd-journal-upload to offload retention.

Verification & Acceptance Criteria

journalctl shows no Suppressed entries and disk usage stays under cap.

Rollback Plan

Restore original journald.conf and run systemctl restart systemd-journald.

Prevention & Hardening

Monitor /var/log/journal size via Prometheus node_exporter textfile.

Related Errors & Cross-Refs

Pairs with Suppressed N messages and high IOWait during log writes.

Related tutorial: View the step-by-step tutorial for centos-stream-9.

View all centos-stream-9 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

journald.conf(5) and Red Hat logging guide.