Ubuntu 14.04 LTS Common Problem 189 – 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

Critical services are killed during memory pressure events.

Environment & Reproduction

Ubuntu 14.04 hosts with constrained RAM and sudden workload spikes.

Root Cause Analysis

Memory overcommit and insufficient swap trigger OOM killer decisions.

Quick Triage

Correlate service crashes with kernel OOM logs and memory saturation.

Step-by-Step Diagnosis

Profile top memory consumers, swap behavior, and allocation patterns.

Solution – Primary Fix

Reduce memory footprint, tune service limits, and add or optimize swap resources.

Solution – Alternative Approaches

Scale workload horizontally or move heavy processes to dedicated hosts.

Verification & Acceptance Criteria

No OOM kills under expected peak load and service uptime stabilizes.

Rollback Plan

Revert tuning changes if they reduce performance below acceptable baseline.

Prevention & Hardening

Set memory alerts and capacity plans with growth-based thresholds.

Related Errors & Cross-Refs

Out of memory kill process, memory cgroup pressure.

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 and swap tuning references.