- Disk space. Every generated chunk is written to disk. While all Sculk Hosting plans include unmetered NVMe storage, a fair-use soft limit of 100 GB applies — generating an entire world will blow past it long before players ever reach the edge.
- Generation time and CPU load. Pre-generation is CPU-intensive. Generating millions of chunks can take days of continuous load and degrades performance for anyone playing while it runs.
- Backup and restore overhead. Larger worlds mean larger backups, longer save times, and slower restores if something goes wrong.
- Diminishing returns. Players almost never travel more than a few thousand blocks from spawn. Pre-generating beyond that wastes resources on terrain no one will see.
Installing Chunky
Chunky works on Bukkit, Spigot, Paper, Purpur, Fabric, Forge, and NeoForge. Use the plugin manager for the fastest install, or upload the JAR manually if your server type isn’t supported in the search.Option 1: Install from the plugin manager (recommended)
Open the plugin manager
Log in to panel.sculkhosting.com, select your server, and click the Plugins or Mods tab in the sidebar.
Click Install
Click Install next to Chunky. The panel downloads and places the file in your
plugins or mods folder automatically.Option 2: Install manually
Download Chunky
Get the latest release from the Chunky page on Modrinth for your server type and Minecraft version.
Upload the file
Open the file manager, navigate to the
plugins folder (Bukkit/Spigot/Paper/Purpur) or mods folder (Fabric/Forge/NeoForge), and upload the JAR.Pre-generating your world
Once Chunky is installed and the server has restarted, run pre-generation commands from the Console tab.Set the world
In the console, set the world Chunky should target. For most servers this is your overworld:Replace
world with world_nether or world_the_end for those dimensions.Set the center point
By default Chunky generates around
0, 0. To center on your spawn or a specific location:Set a safe radius
This is the most important step. Cap the radius to control how much disk space pre-generation will consume:Recommended radii:
Stay well below your plan’s storage limit. Check current usage in the panel sidebar before deciding.
| Server size | Radius (blocks) | Approximate world size |
|---|---|---|
| Small / private | 1,000–2,000 | ~200–500 MB |
| Medium community | 2,000–5,000 | ~1–3 GB |
| Large public | 5,000–10,000 | ~3–10 GB |
Start generation
Begin pre-generating:Chunky prints progress updates in the console. Generation continues in the background and survives restarts.
Performance tips
- Generate during off-peak hours. Pre-generation is CPU-intensive and can affect performance for online players. Run it overnight or when your server is quiet.
- Throttle if needed. Lower Chunky’s CPU impact by reducing how aggressively it generates:
- Pre-generate the Nether at 1/8th radius. The Nether uses an 8:1 coordinate ratio with the overworld. If your overworld radius is 3,000, set the Nether radius to about 375 to cover the equivalent area without wasting disk.
- Don’t re-run unnecessarily. Once chunks are generated, they’re saved permanently. You only need to pre-generate again if you expand the playable area.
If you fill your storage quota, your server may fail to save world data or stop responding. If you’re unsure how much space your plan includes, check your current usage in the panel or contact support before running large pre-generations.