Ubuntu 14.04 LTS Common Problem 197 – Definitive Diagnosis, Recovery, and 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

System becomes unstable under bursts because no effective swap is available.

Environment & Reproduction

Ubuntu 14.04 hosts with disabled swap partition/file or failed mount.

Root Cause Analysis

Swap entry missing, inactive, or misconfigured in filesystem table.

Quick Triage

Check active swap devices and memory pressure indicators.

Step-by-Step Diagnosis

Review swap configuration, fstab entries, and boot-time activation status.

Solution – Primary Fix

Create or reactivate swap, persist configuration, and tune swappiness for workload.

Solution – Alternative Approaches

Increase physical memory or redistribute memory-heavy services.

Verification & Acceptance Criteria

Swap is active and OOM events reduce under representative load.

Rollback Plan

Disable new swap configuration if performance regressions appear.

Prevention & Hardening

Baseline swap policy and alert on inactive swap state.

Related Errors & Cross-Refs

OOM kill, vm pressure spikes, memory allocation failures.

Related tutorial: View the step-by-step tutorial for Ubuntu 14.04 LTS.

View all Ubuntu 14.04 LTS tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

Linux swap management and memory tuning references.