Chunky for Minecraft: Pre-Generate Chunks to Reduce Lag

A lot of survival server lag appears when multiple players explore new terrain at the same time. The server is not only moving players; it is generating terrain, saving chunks, and loading structures. Chunky helps prepare part of the world before launch.

Pre-generation is not magic, but it reduces the first-exploration workload.

What Chunky does

Chunky generates chunks inside a selected area. You choose the world, center, radius, and shape. It shows progress and lets you pause or continue tasks.

A typical flow:

• /chunky world world
• /chunky center 0 0
• /chunky radius 3000
• /chunky shape circle
• /chunky start
• /chunky progress

Start with a reasonable radius around spawn or the first play area. You do not need a giant pregenerated map if your group will stay near home for the first weeks.

When to use it

Chunky is useful before:

• opening a survival server with many players;
• launching an SMP with heavy exploration;
• giving players Elytras early;
• running a modpack with heavy dimensions;
• reducing first-session stutter.

If you are building a modpack server, combine this with the modpack checklist. For resource planning, read how many players a Minecraft server can handle.

What to avoid

Do not run a huge radius without checking disk space. Do not run heavy generation during an important play session if performance drops. Be careful with cleanup commands like trim; deleting chunks outside a selection can be destructive. Back up first.

On Mineando

On Mineando, you can prepare the world during a setup session and stop the server until game day. That lets you spend resources when they matter, not all month.