High CPU usage can cause lag, TPS drops, and poor performance on your Minecraft server. This guide will help you identify and resolve CPU bottlenecks to improve your server's performance.

Introduction

CPU usage is one of the most critical factors affecting Minecraft server performance. When your server's CPU is overloaded, players experience lag, block updates become delayed, and the overall gameplay experience suffers.

Identifying CPU Issues

Before optimizing, you need to identify what's causing high CPU usage:

• Use /tps command to check server performance
• Monitor with plugins like Spark or Timings
• Check for excessive entities or redstone contraptions
• Look for memory leaks in plugins

Optimize Server Settings

Adjust these server.properties settings to reduce CPU load:

Plugin Optimization

Plugins can significantly impact CPU usage:

• Remove unused or redundant plugins
• Update plugins to latest versions
• Configure plugin settings for optimal performance
• Use lightweight alternatives when possible

World Optimization

World-related optimizations can reduce CPU load:

• Remove excessive entities (mobs, items, armor stands)
• Limit redstone contraptions and hopper clocks
• Use world border to limit world size
• Regularly clean up dropped items

Hardware Considerations

If software optimizations aren't enough, consider hardware upgrades:

• Upgrade to a CPU with higher single-core performance
• Ensure adequate cooling to prevent thermal throttling
• Use SSD storage for faster world loading
• Consider dedicated server hosting for better performance

Monitoring Tools

Use these tools to monitor and identify performance issues:

• Spark profiler for detailed performance analysis
• Timings reports for plugin performance
• Server monitoring plugins like Plan
• Built-in /debug command for performance metrics

Conclusion

Reducing CPU usage requires a combination of server configuration, plugin optimization, and proper world management. Regular monitoring and maintenance will help keep your server running smoothly and provide the best experience for your players.