How Much RAM Does Your Minecraft Server Need?
One of the most common questions when setting up a Minecraft server: how much RAM do I actually need? The answer depends on your server type, player count, mods, and plugins. This guide helps you calculate the right amount — so you don't overpay or under-provision.
Why RAM Matters for Minecraft Servers
RAM (Random Access Memory) stores everything your Minecraft server needs to access quickly — loaded chunks, entity data, plugin data, player inventories, and the world itself. When your server runs out of RAM, it either crashes with an OutOfMemoryError or starts writing data to disk (swap), which is thousands of times slower and causes extreme lag.
However, more RAM isn't always better. Allocating too much RAM (say, 16 GB to a server that only needs 4 GB) actually hurts performance because Java's garbage collector takes longer to clean up the larger heap. The goal is to allocate enough RAM — not as much as possible.
RAM Requirements by Server Type
Vanilla Minecraft (No Mods or Plugins)
| Players | Recommended RAM | Notes |
|---|---|---|
| 1-5 | 2 GB | Minimum for a smooth vanilla experience |
| 5-10 | 3 GB | Handles small friend groups comfortably |
| 10-20 | 4 GB | Starts to push vanilla limits; consider Paper |
Paper / Spigot / Purpur (Plugins Only)
| Players | Recommended RAM | Notes |
|---|---|---|
| 1-10 | 3 GB | 10-15 lightweight plugins |
| 10-25 | 4-5 GB | 20+ plugins including EssentialsX, LuckPerms |
| 25-50 | 6-8 GB | Heavy plugins like Dynmap, CoreProtect, MCMMO |
| 50-100 | 8-12 GB | Large network with multiple worlds |
Forge / NeoForge (Modded Minecraft)
| Modpack Size | Recommended RAM | Examples |
|---|---|---|
| Light (20-50 mods) | 4-6 GB | Create, Botania, Immersive Engineering |
| Medium (50-150 mods) | 6-8 GB | Better Minecraft, Vault Hunters |
| Heavy (150-300 mods) | 8-12 GB | All the Mods 9, RLCraft, FTB Presents Direwolf20 |
| Massive (300+ mods) | 12-16 GB | All the Mods 10, custom kitchen-sink packs |
Fabric (Performance-Focused Mods)
| Setup | Recommended RAM | Notes |
|---|---|---|
| Fabric + Lithium/Sodium | 2-3 GB | Performance mods barely add RAM usage |
| Fabric + 20-50 mods | 4-6 GB | Lighter than equivalent Forge setup |
| Fabric + 100+ mods | 6-10 GB | Large Fabric modpacks |
Proxy Networks (BungeeCord / Velocity)
If you're running a multi-server network with a proxy, each component needs its own RAM allocation:
- Velocity/BungeeCord proxy: 512 MB - 1 GB (very lightweight)
- Each sub-server: Calculate independently using the tables above
- Lobby server: 1-2 GB (small world, few entities)
Factors That Increase RAM Usage
World Size and Loaded Chunks
Each loaded chunk consumes approximately 1-2 MB of RAM. With a view distance of 10, each online player loads about 441 chunks (21x21 area). With 20 players, that's potentially 8,820 chunks — though overlap reduces this significantly.
Reducing view-distance from 10 to 7 reduces per-player chunk load by 51%. This is one of the most effective ways to reduce RAM usage.
Entity Count
Mobs, animals, dropped items, armor stands, and minecarts all consume RAM. A large animal farm with 200 cows uses noticeably more memory than an empty field. Mob farms that spawn hundreds of entities are the biggest offenders — set entity limits in your server configuration.
Plugin Data Caching
Plugins like CoreProtect cache block change history in RAM for fast lookups. Dynmap stores rendered map tiles. WorldGuard loads region data. Each plugin's memory footprint varies, but 20+ active plugins can add 500 MB - 1 GB of overhead collectively.
Mod Complexity
Content mods that add new blocks, items, and dimensions (like Create, Mekanism, or Thermal Expansion) increase RAM usage significantly. Tech mods with automation (pipes, cables, machines) that process items every tick are particularly memory-hungry. A large automated factory in Create can use 200-500 MB of RAM on its own.
Signs You Need More RAM
- Server crashes with
OutOfMemoryError— Clear sign you need more RAM - Frequent garbage collection pauses — Check with Spark profiler; if GC runs every few seconds, you're running too tight
- Server becomes slower over time — Memory pressure causes increased GC activity
- Swap usage on VPS — If
free -hshows swap being used, you need more RAM
Signs You Have Too Much RAM
- Allocated 8+ GB but usage never exceeds 3 GB — You're wasting money on unused resources
- GC pauses are long (500ms+) but infrequent — Large heap = longer GC pauses. Reduce to shorten them.
Quick Decision Guide
Playing with friends (2-5 players), vanilla or Paper? Start with 2-3 GB.
Running a public server with plugins (10-30 players)? Start with 4-6 GB.
Running a modded server (Forge/Fabric)? Match the modpack recommendations, usually 6-10 GB.
Running a large network? Calculate per-server, then add 20% buffer.
When in doubt, start smaller and upgrade if you hit limits. It's better to monitor actual usage for a week and then right-size your plan than to guess and overpay from day one.
Get the Right Plan
Azion Cloud offers Minecraft hosting plans from 2 GB to 16 GB RAM, all on Intel Xeon Platinum processors with NVMe SSDs. Browse our plans and pick the one that matches your server type from the tables above. Need help deciding? Join our Discord and we'll recommend the right plan for your setup.