How Much RAM Does A Minecraft Server Need (By Mod Count And Player Count)

How Much RAM Does a Minecraft Server Need (by Mod Count and Player Count)

Most Minecraft servers need between 2 GB and 12 GB of RAM. The exact amount depends on how many players you have, what mods or plugins you run, and how big your world is. This article gives you the answer for every common setup, in a single lookup table you can scan in 10 seconds.

If you are shopping for a Minecraft hosting plan and you just need a number, scroll to the table below. The rest of the article explains why those numbers are what they are, what happens when you get it wrong, and what to do if your setup does not match a row.

The complete RAM lookup table

This is the answer for almost every Minecraft server you might want to run. Scan to your row, get your number.

Vanilla servers (no mods, no plugins)

Plugin servers (Paper/Spigot, no mods)

Plugins add small overhead. Most servers run 10-30 plugins comfortably.

Lightly modded servers (10-50 mods)

Medium modpacks (50-150 mods)

Examples: most custom Forge/Fabric packs, FTB Skies, Better Minecraft, Vault Hunters

Heavy modpacks (150-300 mods)

Examples: All The Mods 10, RAD2, Create: Above and Beyond

Massive modpacks (300+ mods)

Examples: GregTech New Horizons, MeatballCraft, custom kitchen-sink packs

Quick reference for popular modpacks (5-15 players)

Why these specific numbers

When your server runs, several things consume RAM at the same time:

• Loaded chunks. Every player loads a circle of chunks around themselves. More players = more loaded chunks = more RAM.
• Entities. Mobs, items, arrows, paintings, item frames. Every entity gets ticked and stored in RAM.
• Mods and plugins. Each mod or plugin loads its own classes and state into memory. Heavier mods (especially tech mods like GregTech or magic mods like Botania) load more.
• Java overhead. The Java Virtual Machine itself needs about 512 MB to 1 GB just to run.
• Garbage collection headroom. Java needs about 20-30 percent free RAM to garbage-collect efficiently.

The numbers above account for all of these together, with reasonable headroom for normal play.

What happens if you get it wrong

Too little RAM:

• Server crashes with java.lang.OutOfMemoryError
• TPS drops the longer the server runs
• Long pauses every few minutes (garbage collection in panic mode)
• New chunks fail to load
• Players see "the server froze for a second" repeatedly

Too much RAM:

• Long noticeable freezes every 30-60 minutes (garbage collection scanning a huge heap)
• TPS hitches that have no obvious cause
• You are paying for RAM your server is not using

The sweet spot is whatever your specific setup actually needs, plus 1-2 GB of headroom. That is what the table above gives you.

Common scenarios

Some real-world setups, with the right answer for each:

My friends and I (4 people) want a vanilla world to mess around in:
2 GB. Maybe 3 GB if you have multiple chunk-loaders or large farms.

Small SMP, 10 players, Paper with 20 plugins:
4 GB.

Public server, 50 players, vanilla with anti-grief plugins:
6-8 GB.

Modded with 5 friends running ATM10:
10-12 GB.

Modded with 5 friends running RLCraft:
6-8 GB. RLCraft is lighter than ATM10 despite being heavily modded.

Pixelmon server with 15-30 players:
10-12 GB. Pixelmon is heavier than its mod count suggests because each Pokemon is a complex entity.

My modpack does not match any of the popular ones above:
Use this rough formula. Start with 2 GB base, add 1 GB per 50 mods, add 1 GB per 10 players above 5. That gets you within 1-2 GB of the right answer.

Signs you have the wrong amount

You need to upgrade if you see:

• Server crashes with OutOfMemoryError in the logs
• TPS drops that get worse the longer the server runs (memory leak symptom)
• Players reporting frequent micro-freezes
• Inability to load chunks when players explore new areas

You can downgrade if you see:

• Server uses less than 50 percent of allocated RAM under normal load (check your panel)
• Long noticeable freezes every 30+ minutes
• Server has been running fine for months at low actual usage

To check your real usage:

• Paper/Spigot: Run /spark heap for a snapshot
• Forge: Use the Spark mod or check the F3 debug screen on a connected client
• Your hosting panel: Most show real-time RAM usage

A healthy server uses 60-80 percent of allocated RAM under normal load.

A quick word on RAM and lag

A common misconception: "if my server is laggy, more RAM will fix it."

Sometimes yes, often no. RAM only fixes lag caused by RAM starvation. If your TPS is dropping while your RAM usage is at 50 percent, more RAM does nothing. The bottleneck is your CPU.

The right RAM tier is the one where your server actually uses 60-80 percent. Beyond that, more RAM does not equal more speed.

What about Bedrock servers?

Bedrock dedicated servers are dramatically more memory-efficient than Java. Most Bedrock servers run fine on 1-2 GB even with 50 players. The numbers in this article are for Java Edition specifically.

A short FAQ

My modpack page says "8 GB recommended" but you say 10-12. Who's right?
Both are right. Modpack pages give you the absolute minimum that will let the server boot. We give you the amount that will let the server boot AND run smoothly with multiple players. If you are running solo, the modpack's recommendation is fine. With players, scale up.

Do plugins really use that much RAM?
Most plugins use 50-150 MB each. A "30 plugin" server might use 3-4 GB just for plugin overhead. Some plugins (Skript with many scripts, WorldGuard with many regions, large databases) can use far more.

Can I share RAM between two servers on the same plan?
No. Each Minecraft server is its own Java process and gets its own allocated heap. If you have a 16 GB plan and want to run two servers, you split it (e.g., 8 GB + 8 GB), not share dynamically.

Does view distance affect RAM usage?
Yes, significantly. Each chunk loaded into a player's view costs about 50 KB minimum. View distance 16 with 50 players means hundreds of MB just in chunk data. Drop to view distance 8-10 if you are tight on RAM.

What about pre-generated worlds?
Pre-generating chunks reduces the spike of new chunk creation but does not reduce ongoing RAM usage. Your players still load chunks into memory either way.

Do better hard drives reduce RAM needs?
Indirectly. NVMe SSDs (used by Server Heron and other premium hosts) load chunks faster, which means fewer chunks sit in RAM waiting for slow disk I/O. The effect is small but real.

Wrapping up

For most Minecraft servers, the right amount of RAM is between 2 GB and 12 GB. Use the lookup table at the top of this article to find your specific setup. Scale up if your server crashes or lags from RAM starvation. Scale down if you are using less than half of what is allocated.

Do not overpay for RAM you do not need. Do not under-allocate to save money. The right tier is the one where your server hits 60-80 percent usage under normal load.

If you are still not sure, start with the lower number from the table. You can always upgrade later.