Ubuntu 14.04 LTS Swap Exhaustion Causes OOM Kills

📖 ~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

Critical processes terminate under memory pressure, degrading application availability and reliability.

Environment & Reproduction

Appears during load spikes, memory leaks, or undersized VM resource profiles.

Root Cause Analysis

RAM and swap depletion force kernel OOM decisions that kill high-consumption processes.

Quick Triage

Identify top memory consumers and recent OOM events from kernel log history.

Step-by-Step Diagnosis

Correlate process growth trends with workload timeline and swap activity metrics.

Solution – Primary Fix

Add swap headroom and tune memory-hungry services while addressing leak sources.

Solution – Alternative Approaches

Scale memory allocation or partition workloads to reduce single-host pressure peaks.

Verification & Acceptance Criteria

No further OOM kills under expected load and swap usage remains within policy.

Rollback Plan

Disable newly added swapfile if performance regressions or storage contention occur.

Prevention & Hardening

Set memory alerts and enforce capacity planning with application profiling baselines.

Related Errors & Cross-Refs

Killed process messages, stalled worker pools, and sudden service restarts.

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 memory management docs and Ubuntu tuning recommendations.