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Fix Database Connection Errors in n8n: 5 Steps

February 6, 2026
n8n Installation & Setup Errors

n8n missing environment variables – what N8N_HOST, N8N_LISTEN_ADDRESS, and WEBHOOK_URL actually do

March 28, 2026
n8n Installation & Setup Errors

n8n proxy configuration error – HTTP_PROXY, HTTPS_PROXY, and NO_PROXY fix

April 19, 2026
n8n Installation & Setup Errors

Fix 3 SSL Certificate Errors in n8n Before Workflows Break

March 30, 2026
n8n Installation & Setup Errors

n8n on Windows – fix node-gyp build errors and EPERM operation not permitted

March 28, 2026
n8n Installation & Setup Errors

n8n on macOS – fix EACCES: permission denied, mkdir ‘/usr/local/lib/node_modules/n8n’

March 28, 2026
n8n Installation & Setup Errors

n8n Linux systemd service error – permission denied and failed to start fix

March 28, 2026
n8n Installation & Setup Errors

n8n memory limit error – fatal: reached heap limit allocation failed

March 28, 2026
n8n Installation & Setup Errors
← Previous 1 … 31 32 33 … 39 Next →

Categories

  • Docker Debugging (3)
  • n8n API Integration Errors (17)
  • n8n Architectural & Decision-Making (16)
  • n8n Architectural Failure Modes (13)
  • n8n Architecture & Execution Foundations (19)
  • n8n Authentication Errors (16)
  • n8n Automations (2)
  • n8n Cost & Infrastructure Economics (15)
  • n8n Degradation & Stability Issues (12)
  • n8n Installation & Setup Errors (16)
  • n8n MongoDB errors (12)
  • n8n Node-Specific Errors (25)
  • n8n Performance & Scaling (26)
  • n8n PostgreSQL Errors (4)
  • n8n Production Failure Patterns (11)
  • n8n Production Readiness & Scalability Risks (12)
  • n8n Queue Mode Errors (26)
  • n8n Redis errors (15)
  • n8n Security Errors (12)
  • n8n SQLite errors (13)
  • n8n vs Zapier (5)
  • n8n Webhook Errors (17)
  • Uncategorized (1)

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Table of Contents

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  • Quick Diagnosis Fix the “JavaScript heap out of memory” / “OOM killed” crash when starting n8n
  • Why n8n hits the memory ceiling
  • 1. Adjust Node.js heap size (npm / plain binary)
  • 2. Docker‑specific memory allocation
    • 2.1 Using docker run
    • 2.2 Using docker‑compose.yml
  • 3. Enabling and tuning swap on the host (Linux)
    • 3.1 Create a 4 GB swap file
    • 3.2 Persist swap across reboots
    • 3.3 Tune kernel swappiness
  • 4. Diagnosing the root cause
    • Step‑by‑step troubleshooting checklist
  • 5. Production‑grade best practices
  • 6. Common pitfalls & how to avoid them
  • 7. Quick reference cheat sheet

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