Vault Hunters Server Hosting: Complete Setup Guide 2025

Vault Hunters is sick. Running vaults with friends makes it even better. But hosting a VH server needs the right setup, or vault dimensions will lag like crazy.

Here is how to host Vault Hunters without performance issues.

What Makes Vault Hunters Different?

Unlike normal Minecraft, Vault Hunters has unique hosting needs:

Vault dimensions: Every time someone runs a vault, the server creates a temporary dimension. This needs RAM and CPU.

Custom mechanics: The knowledge system, abilities and gear all add server load.

Mob spawning: Vaults spawn TONS of mobs. Way more than vanilla.

Loot generation: Calculating all the custom loot takes processing power.

If your server can't keep up with these, vaults turn into laggy messes.

RAM Requirements for Vault Hunters

These are the starting points we recommend:

For 2-4 players: 6GB minimum

• 8GB recommended
• Every active vault is its own dimension in memory
• Usually only 1 or 2 vaults are running at once

For 5-10 players: 8-10GB minimum

• 12GB recommended
• Multiple vaults running simultaneously
• Need headroom for all the dimensions

For 10+ players: 12-16GB

• Lots of vaults active at same time
• Knowledge unlocks and abilities add up
• Don't cheap out here

Vault Hunters uses more RAM than vanilla but less than huge modpacks like ATM9.

CPU Needs

Vault dimensions mean lots of chunk generation and mob spawning.

Good CPUs:

• Ryzen 9 (high clock speed)
• i9 or a good Xeon
• 3.5GHz+ single core

Bad CPUs:

• Old low-clock Xeons
• Budget processors
• Heavily oversold nodes where your server has to wait for CPU time

When 3 people are running vaults at the same time, you need CPU power.

Hosting Vault Hunters on Space-Node

Recommended plan: MC Lapis (6GB) for EUR 5.40/month as the minimum for 2-4 players, or MC Diamond (8GB) for EUR 7.20/month if you want headroom

For 5-10 players, MC Special 1 (12GB) for EUR 10.80/month. Those are Standard tier prices.

What you get:

• Ryzen 9 CPUs with strong single-thread speed (the exact model depends on the region and tier)
• A fixed RAM allocation for your server
• NVMe storage for fast chunk and dimension loading
• Custom JVM arguments and full file access over SFTP

Vault generation and the mob waves inside a vault lean on single-thread CPU speed. Once you have enough RAM, a fast core matters more than extra gigabytes.

Server Setup Walkthrough

Step 1: Get Vault Hunters Server Files

Download from CurseForge:

• Get latest VH version (3 or 4, whichever you want)
• Download SERVER files not client
• Make sure it matches your client version exactly

Step 2: Upload Files

Using FTP (FileZilla):

1. Connect to your Space-Node server
2. Upload all the VH files
3. Mods folder, config folder, everything
4. Don't forget the server.jar

Takes about 10 minutes depending on internet speed.

Step 3: RAM Allocation

For 6GB server:

-Xms6G -Xmx6G

For 8GB server:

-Xms8G -Xmx8G

Keep Xms and Xmx the same for VH. More stable.

Step 4: Java Arguments

Good arguments for VH (adjust RAM as needed):

java -Xms8G -Xmx8G -XX:+UseG1GC -XX:+ParallelRefProcEnabled -XX:MaxGCPauseMillis=200 -XX:+UnlockExperimentalVMOptions -XX:+DisableExplicitGC -XX:+AlwaysPreTouch -XX:G1NewSizePercent=30 -XX:G1MaxNewSizePercent=40 -XX:G1HeapRegionSize=8M -XX:G1ReservePercent=20 -XX:G1HeapWastePercent=5 -XX:G1MixedGCCountTarget=4 -XX:InitiatingHeapOccupancyPercent=15 -XX:G1MixedGCLiveThresholdPercent=90 -XX:G1RSetUpdatingPauseTimePercent=5 -XX:SurvivorRatio=32 -XX:+PerfDisableSharedMem -XX:MaxTenuringThreshold=1 -jar server.jar nogui

These help with garbage collection during vaults.

Step 5: Server Configuration

Edit server.properties:

view-distance=10
simulation-distance=8
max-tick-time=60000

Don't go higher than 10 view distance or vaults will lag.

Vault Performance Optimization

Config Tweaks

In vaulthunters-config.toml:

Mob spawning limits: Set reasonable caps so vaults don't spawn infinite mobs and kill TPS.

Loot calculation: The default settings are usually fine but if laggy, you can tweak complexity.

Regular Vault Cleanup

Vault dimensions don't auto-delete immediately. Set up a task to clean old vault dimensions:

Space-Node support can help set up automatic cleanup script that runs daily.

Chunk Loading Settings

Make sure players aren't chunk loading massive areas in overworld while running vaults.

Limit chunk loaders or use FTB Chunks with reasonable limits.

Common Vault Hunters Issues

"Vaults are super laggy"

Either:

• Your CPU is too slow (get better hosting)
• Too many vaults running at once (limit concurrent vaults)
• RAM is full (upgrade plan)

Check TPS with /forge tps. Should be 19-20.

"Vault failed to generate"

Usually happens when:

• Out of RAM (upgrade)
• Timeout because CPU is slow (better host)
• Corrupted vault dimension (restart server)

"Server crashes when multiple people run vaults"

Not enough RAM. Each vault needs resources.

If 4 people run vaults at the same time on a 4GB server, it will most likely run out of memory. Plan for 8GB.

"Mobs spawn but then disappear"

Entity culling is too aggressive or RAM issues causing cleanup.

Check your configs and RAM usage.

Player Count Recommendations

How many players can run VH smoothly? These are starting points, not tested limits. How often people run vaults at the same time matters more than the number of people online.

6GB RAM (MC Lapis, EUR 5.40/month):

• 2-4 players, the minimum we would use

8GB RAM (MC Diamond, EUR 7.20/month):

• 2-4 players with comfortable headroom

12GB RAM (MC Special 1, EUR 10.80/month):

• 5-10 players

16GB RAM (MC Special 3, EUR 14.40/month):

• 10+ players

Remember, not everyone runs vaults at the exact same time, so you can support more players than concurrent vaults.

Backups Are CRITICAL for VH

Vault Hunters has tons of custom data: knowledge unlocks, vault stats, gear and more.

Backup daily:

• World folder
• Player data especially
• Config folder (if you tweak stuff)

Losing 50 hours of vault progress because no backups would SUCK.

Space-Node includes backup tools. Use them.

Cost Breakdown for VH

For a small friend group (2-4 players):

• MC Lapis: EUR 5.40/month (6GB), about EUR 1.35 per player with four people
• MC Diamond: EUR 7.20/month (8GB) if you want headroom

For a medium group (5-10 players):

• MC Special 1: EUR 10.80/month (12GB)
• About EUR 1.10 to EUR 2.20 per player

For a community (10-15 players):

• MC Special 3: EUR 14.40/month (16GB)
• About EUR 1 to EUR 1.45 per player

Those are Standard tier prices. Realms can't run modpacks at all, so it is not an option for VH.

Vault Hunters 3 vs 4

VH3:

• More stable (been out longer)
• Lots of guides available
• Lighter on resources
• Recommend: 6GB for small groups

VH4:

• Newer with more content
• Slightly heavier (more mods)
• Amazing new features
• Recommend: 8GB for small groups

Match your plan to the version you run and read the pack's own release notes for its requirements.

What to Check on a Cheap Host

Vault Hunters exposes weak hosting fast, because every vault run generates a new dimension full of mobs. Before you settle on a budget plan, check:

• Which CPU the plan runs on. A host that won't name the model is a warning sign.
• Whether you get a fixed amount of RAM or an "up to" figure.
• Whether storage is NVMe.
• Whether you can set your own JVM arguments.

Then test it yourself before inviting everyone: run two or three vaults at the same time with friends and watch /forge tps. If TPS holds near 20 while vaults generate, the plan fits. If it sinks every time a vault opens, you need a faster CPU or more RAM.

Multiplayer vs Singleplayer

"Should I just play VH singleplayer?"

Singleplayer is fine but:

• Can't play with friends
• No trading gear/knowledge
• No co-op vaults (way more fun)
• Boring after a while

Multiplayer on a good host:

• Run vaults together
• Trade and help each other
• Compete on leaderboards
• Way more engaging
• MC Lapis at EUR 5.40/month split between four friends is about EUR 1.35 each

If you have friends who play Minecraft, multiplayer VH is 100% worth it.

Our Recommendation

For Vault Hunters specifically:

2-4 players: MC Lapis (6GB), EUR 5.40/month, or MC Diamond (8GB), EUR 7.20/month for headroom

• Right size for a small group
• Room for a couple of vaults at once
• Cheap enough to run indefinitely

5-10 players: MC Special 1 (12GB), EUR 10.80/month

• Great for active groups
• Room for multiple concurrent vaults

10+ players: MC Special 3 (16GB), EUR 14.40/month

• Community server size
• Handles lots of vault activity

Check out Space-Node's Minecraft hosting for VH servers.

Or if you want to run VH next to other servers, a VPS lets you run multiple modpacks on one machine. Our VPS plans are out of stock until about the end of October.

Quick Setup Checklist

• Download VH server files matching your client version
• Get Space-Node hosting (MC Lapis or MC Diamond for a small group)
• Upload files via FTP
• Set RAM allocation properly
• Use optimized Java arguments
• Configure view distance (max 10)
• Set up automatic backups
• Test vault generation before inviting players
• Set player limits based on your RAM
• Enjoy smooth vault runs!

Final Thoughts

Vault Hunters is one of the best modpacks for multiplayer. But it needs decent hosting because of the vault dimension system.

Don't cheap out on RAM and get laggy vaults. A plan that fits the group costs a few euro a month, and your friends will notice the difference the first time three of you open a vault at once.

Good hosting keeps a VH group playing. Bad hosting makes people quit after a few days.

Choose wisely.

Vault Hunters 3 server hosting quick answers

Vault Hunters is more demanding than a vanilla SMP because vault runs, dimensions, loot systems, and modded progression all add server load. If players report lag only inside vaults, profile during a vault run rather than at spawn.