How much RAM do you need for a Minecraft server?

The question comes up again and again among administrators: how much RAM do you really need for a Minecraft server? The answer depends on three key factors: the number of connected players, the type of server (Vanilla, Paper, modpack) and the allowed render distance. This guide gives you concrete benchmarks so you neither under-size your setup nor waste your budget.

Why is RAM so important?

Minecraft generates and keeps in memory the chunks (16x16 block areas) around each player. The more players are scattered across the map, the more chunks the server has to load simultaneously. If available RAM is insufficient, the Java garbage collector kicks in too often, causing micro-freezes and a drop in TPS (ticks per second). Below 20 TPS, the game becomes choppy for everyone.

Recommended RAM based on player count

Here are proven benchmarks for a Vanilla or Paper server without heavy mods, with a reasonable render distance (8 to 10 chunks):

Vanilla and Paper: lightness first

An official Vanilla server is functional but poorly optimized. We almost always recommend Paper (or Purpur), a derived version that fixes hundreds of performance issues and adds fine-grained configuration options. For the same player count, Paper consumes less RAM and holds a better TPS than the official server. For a small community, 4 GB is plenty with Paper, where Vanilla would already start to struggle.

Modpacks: multiply your needs

Forge or Fabric modpacks completely change the equation. Each mod adds entities, blocks, recipes and sometimes an entirely new world generation. A popular modpack like All the Mods or RLCraft demands far more than Vanilla:

• Light modpack (20 to 50 mods): 4 to 6 GB for a few players.
• Medium modpack (100 to 150 mods): 6 to 8 GB.
• Large modpack (200+ mods): 8 to 12 GB, or even more in multiplayer.

Also remember to check the Java version required by the pack: recent versions (Java 17 or 21) handle memory far better than older ones.

Optimizing instead of just adding RAM

Increasing RAM is not always the solution. Before paying for more memory, apply these best practices:

• Reduce the simulation distance: going from 10 to 6 chunks lightens the load enormously.
• Use Aikar's Flags: this set of Java parameters optimizes the G1GC garbage collector and smooths out performance.
• Limit entities: configure mob spawning and enable item merging on the ground in Paper.
• Pre-generate the map with a plugin like Chunky to avoid load spikes when players explore.
• Monitor with /tps and Spark: these tools pinpoint exactly what is consuming compute time.

Beware the over-allocation trap

Giving 16 GB to a small 5-player server is counterproductive. The larger the memory heap, the longer garbage collector pauses can last. The goal is to allocate just what you need, with a small margin, and to tune the Java flags well. A properly configured 8 GB server often outperforms a 16 GB server left on defaults.

Also keep in mind that RAM is not the only factor. The processor plays a decisive role: Minecraft is largely single-threaded for the main tick, which means a high-frequency CPU will often matter more than a large number of cores. If your TPS drops while RAM is not saturated, the bottleneck is probably the processor or an overly greedy plugin.

Plugins, minigames and networks

The consumption profile also changes depending on how your server is used. A classic survival server mostly stresses terrain generation and entities. Conversely, a minigame server or a hub loads many plugins (match management, holograms, interfaces) that weigh more on memory than on terrain. For large multi-server projects, the load is distributed behind a Velocity or BungeeCord proxy: each sub-server (lobby, survival, minigames) then receives its own RAM allocation, which is far healthier than cramming everything into a single instance.

How to tell if you are short on RAM

Rather than guessing, measure. Several signals indicate a lack of memory: regular freezes lasting a few seconds, a TPS that collapses during exploration, or OutOfMemory error messages in the console. The Spark profiler remains the go-to tool to visualize heap usage and spot garbage collector pauses. If memory peaks constantly brush up against the allocated limit, it is time to step up a tier; if consumption stays stable and low, there is no need to pay for more.

Launch your optimized Minecraft server with Gamost

At Gamost, our Minecraft plans come preinstalled with Paper, optimized Java flags and built-in Anti-DDoS protection, so you can focus on your community rather than on configuration. You can scale RAM in a few clicks if your server grows. Discover our plans in our catalog and choose the power that fits your real needs.