How to Pregenerate Chunks with Chunky

Why Pregenerate Chunks?

Chunk pregeneration allows you to:

• Reduce lag when exploring new territories
• Improve performance of the server
• Avoid slowdowns during gameplay
• Stabilize TPS (Ticks Per Second)

Prerequisites

• Administrator access to your game panel
• OP or administrator permissions on the server
• Sufficient disk space (pregeneration increases world size)

Step 1: Installing Chunky

Download the Plugin

1. Visit the official page: https://www.spigotmc.org/resources/chunky.81534/
2. Download the latest version of Chunky
3. Also download ChunkyBorder if you want to set a world border

Install on the Server

1. Log in to your game panel
2. Go to the Files or File Manager section
3. Open the plugins folder
4. Upload the Chunky.jar file
5. Restart your server

Step 2: Basic Configuration

Connect to the Server

Connect to your Minecraft server with an administrator account (OP).

Set the Pregeneration Center

By default, Chunky uses the world spawn. To set a custom center:

/chunky center <x> <z>

Example:

/chunky center 0 0

To use your current position:

/chunky center ~

Set the Pregeneration Radius

Choose the size of the area to pregenerate in blocks:

/chunky radius <blocks>

Recommended radius examples:

/chunky radius 1000

For a small server (approximately 2000x2000 blocks)

/chunky radius 2500

For a medium server (approximately 5000x5000 blocks)

/chunky radius 5000

For a large server (approximately 10000x10000 blocks)

Step 3: Start the Pregeneration

Basic Commands

To start pregeneration of the current world:

/chunky start

To start on a specific world:

/chunky world <world_name>
/chunky start

Pregenerate Multiple Worlds

For the overworld:

/chunky world world
/chunky radius 2500
/chunky start

For the Nether:

/chunky world world_nether
/chunky radius 1000
/chunky start

For the End:

/chunky world world_the_end
/chunky radius 1000
/chunky start

Step 4: Manage the Pregeneration

Check Progress

To see real-time progress:

/chunky progress

This command displays:

• Completion percentage
• Number of chunks generated
• Estimated time remaining
• Generation speed

Pause

To pause the generation:

/chunky pause

To resume:

/chunky continue

Stop Completely

To permanently stop the current task:

/chunky cancel

Step 5: Advanced Configuration

Set a Custom Shape

By default, Chunky generates in a circle. To use a square:

/chunky shape square

To return to circle:

/chunky shape circle

Adjust Generation Speed

To avoid overloading the server, you can limit the speed:

/chunky pattern <type>

Available types:

• concentric: Spiral from center (default, recommended)
• loop: Square loop
• spiral: Different spiral

Manage Multiple Tasks

List all current tasks:

/chunky tasks

Continue a specific task:

/chunky continue <world>

Cancel a specific task:

/chunky cancel <world>

Step 6: Performance Optimization

During Pregeneration

To minimize impact on players:

1. Launch pregeneration during off-peak hours (night, few players)
2. Use a moderate radius to start
3. Monitor TPS with /tps or monitoring plugins
4. Pause if the server slows down too much

Monitoring Commands

Check server TPS:

/tps

If TPS drops below 18, consider:

• Pausing the generation
• Reducing the number of connected players
• Allocating more RAM to the server

Step 7: Add a World Border (Optional)

Install ChunkyBorder

1. Download ChunkyBorder from SpigotMC
2. Place it in the plugins folder
3. Restart the server

Set the Border

The border will prevent players from going beyond the pregenerated area:

/chunky worldborder

This command automatically synchronizes the world border with your Chunky area.

Tips and Recommendations

Time Estimation

Pregeneration time depends on:

• The size of the chosen radius
• Your server's power
• Terrain complexity (mountains, caves)

Approximate estimates:

• Radius 1000: 30 minutes to 2 hours
• Radius 2500: 2 to 6 hours
• Radius 5000: 8 to 24 hours

Required Disk Space

Plan for approximately:

• 50-100 MB for a radius of 1000 blocks
• 300-500 MB for a radius of 2500 blocks
• 1-2 GB for a radius of 5000 blocks

These figures vary depending on terrain type.

After Pregeneration

Once complete:

1. Pregeneration stops automatically
2. You can remove Chunky if you no longer need it
3. Server performance will improve during exploration
4. Remember to backup your world

Command Summary

Here's a complete workflow to pregenerate the overworld:

/chunky world world
/chunky center 0 0
/chunky radius 2500
/chunky shape circle
/chunky start

Check progress:

/chunky progress

Pause if necessary:

/chunky pause

Resume:

/chunky continue

Troubleshooting

Server Lags During Generation

• Pause with /chunky pause
• Wait for off-peak hours
• Reduce generation radius
• Increase RAM allocated to the server

Generation is Very Slow

• Check that you have enough RAM
• Temporarily close resource-intensive plugins
• Check available disk space
• Consider a smaller radius

"World not found" Error

• Check the exact world name with /chunky worlds
• The name is case-sensitive
• Use the full name (example: world_nether)

Pregeneration Won't Start

• Check that you are OP: /op <your_username>
• Make sure you have set a center and radius
• Restart the server if necessary

Conclusion

Chunky is a powerful tool for optimizing your Minecraft server. Good pregeneration significantly improves player experience by reducing lag during exploration. Remember to monitor performance during the process and adjust settings according to your server's needs.