Why Your Minecraft Server is Lagging (And How to Fix It)

Understanding Minecraft Server Lag

Server lag, often referred to as 'TPS drop', occurs when your server cannot process game ticks within the standard 50ms window. This results in delayed block breaking, rubber-banding, and slow mob AI. Identifying the root cause is the first step toward a smoother experience.

Common Causes of Lag

• Excessive Entities: Too many mobs, items, or villagers in a single area.
• Unoptimised Plugins: Plugins that perform heavy calculations on the main thread.
• Chunk Loading: Rapid movement through unexplored terrain generates heavy CPU load.
• Resource Exhaustion: Your server may simply require more RAM or CPU power to handle your current player count and modpack size.

How to Fix Performance Issues

On AwakeNode

1. Use the Mod/Plugin Installer: Ensure your plugins are up to date. Outdated plugins are a frequent source of memory leaks. You can manage these directly via the AwakeNode panel.
2. Monitor Resource Usage: Check the panel's live resource graphs to see if you are hitting your RAM limit. If your usage is consistently near 100%, consider upgrading your plan; your Xmx values will update automatically without requiring configuration files.
3. Contact Support: If you suspect your startup flags need tuning or you are experiencing persistent issues despite low usage, open a ticket via the Support tab. Our team can review your JVM settings and advise on performance-optimised flags.

On Other Hosts / Manually

1. Optimise Configuration: Edit your bukkit.yml, spigot.yml, and paper.yml files. Reducing view distance and entity activation ranges can significantly reduce CPU load.
2. Manage Startup Flags: If you have access to your startup script, ensure you are using modern Garbage Collection flags like Aikar's Flags. You will need to edit your startup command via SFTP or your host's control panel.
3. Adjust Memory: If your server is crashing due to 'Out of Memory' errors, manually increase the -Xmx parameter in your startup command to allocate more RAM to the Java process.

Proactive Maintenance

Regularly use the File Manager to clear out unnecessary world data or old logs. If you are running a modded server, ensure you are using a performance-focused server jar like Paper or Purpur, which include built-in optimisations that vanilla jars lack.