How Much RAM for a Minecraft Server? Chart by Player Count

One of the most common questions from new server owners is simple: how much RAM do I actually need? The answer is less straightforward than most guides suggest, because the right amount depends heavily on what you are running, how many players you expect, and which version of Minecraft you are hosting.

This guide breaks down RAM requirements from first principles, covers every major server type, and gives you concrete numbers you can use when choosing a plan. If you are new to hosting, start with our complete server setup guide first.

What RAM Actually Does on a Minecraft Server

Random Access Memory (RAM) is your server’s short-term working memory. Unlike storage (which holds files permanently), RAM holds data that the server needs to access right now, such as loaded chunks, entity states, player inventories, world data, and plugin caches.

When the server loads a chunk, it reads terrain data from disk and places it in RAM so the game engine can process it at 20 ticks per second. When players move around, the server loads new chunks ahead of them and unloads distant ones. All of this chunk data, along with every mob, item, and redstone circuit in those chunks, lives in RAM for as long as it is loaded.

If you give the server too little RAM, several bad things happen:

The Java Virtual Machine (JVM) starts garbage collecting more frequently. This creates brief but noticeable freezes called GC pauses, where the server stops processing ticks while it clears unused objects from memory.
The server may start swapping data to disk, which is orders of magnitude slower than RAM and causes severe lag.
Plugin caches get evicted and rebuilt constantly, adding CPU overhead.
In extreme cases, the server process crashes with an OutOfMemoryError.

Too much RAM, on the other hand, can paradoxically cause longer GC pauses because the JVM has a larger heap to scan during garbage collection. This is why tuning JVM flags matters almost as much as the raw amount of RAM you allocate.

Minimum RAM Requirements by Server Type

Not all Minecraft servers are equal. A vanilla survival world with ten players has very different requirements from a heavily modded server running All the Mods 9.

Vanilla Minecraft (No Mods, No Plugins)

Vanilla is the lightest server type. The game engine itself is not heavily optimized, but it also does not load any third-party code.

Absolute minimum: 1 GB (playable only for 1-3 players in a small world)
Comfortable minimum: 2 GB (suitable for up to 10 players on a standard survival world)
Recommended for stability: 3-4 GB (allows generous view distance and a larger loaded world)

Paper or Spigot (Plugins)

Plugin-based servers are the most common type for public communities. Each plugin adds its own memory footprint. Lightweight plugins like essentials and permissions systems add very little, but complex plugins such as dynamic economy systems, custom terrain generators, or anti-cheat software can add several hundred megabytes each.

Minimum: 2 GB (a small number of essential plugins, under 15 players)
Recommended: 4-6 GB (a full suite of 20-30 plugins, 30-50 players)
Large networks: 8 GB or more per server node

Forge or Fabric Modded Servers

Modded servers have significantly higher RAM requirements. Mods are loaded directly into the JVM alongside the game and often include complex systems, custom world generation, and large asset registries.

Light modpacks (under 50 mods): 4-6 GB
Medium modpacks (50-150 mods): 6-8 GB
Heavy modpacks (150+ mods): 8-16 GB

Bedrock Edition Servers (Bedrock Dedicated Server or PocketMine)

Bedrock servers are written in C++ rather than Java, which means memory management is handled natively rather than through the JVM. This makes them significantly more memory-efficient.

Minimum: 1 GB (up to 10 players)
Recommended: 2-3 GB (up to 30 players)
Large servers: 4 GB (50+ players)

Bedrock servers rarely need more than 4 GB unless you are running a very large player count or complex server software like NukkitX with many plugins.

RAM Recommendation Table by Player Count

The table below provides practical starting points for Paper/Spigot servers (the most common setup). Add 2-4 GB for modded environments.

Player Count	Minimum RAM	Recommended RAM	Notes
1 to 5	1 GB	2 GB	Fine for vanilla or a few plugins
5 to 15	2 GB	3-4 GB	Comfortable for most survival setups
15 to 30	3 GB	4-6 GB	Needs optimization at this range
30 to 50	4 GB	6-8 GB	Paper or Purpur strongly recommended
50 to 100	6 GB	8-12 GB	Consider BungeeCord or Velocity proxy
100+	10 GB	16 GB+	Multi-server network architecture required

These numbers assume a standard survival world with view-distance set to 8-10. If you run view-distance 16 or higher, add at least 1-2 GB to each tier.

RAM Requirements for Popular Mod Packs

RLCraft

RLCraft is one of the most demanding modpacks available. It includes over 100 mods, custom entity AI overhauls, and advanced climate and thirst systems. The overworld is significantly more complex than vanilla.

Client: 4-6 GB recommended
Server: 6-8 GB minimum, 8-10 GB recommended for 10+ players
Expect high CPU usage alongside RAM usage. RLCraft’s mob spawning logic is particularly intensive.

All the Mods 9 (ATM9)

ATM9 is a kitchen-sink modpack containing over 400 mods. It is one of the heaviest packs in active use.

Server: 10-12 GB minimum, 12-16 GB recommended
Allow significant startup time. The pack can take several minutes to load all mod registries.
Java 17 or 21 is required and performs better than Java 8 for this pack.

Create (and Create-based packs)

The Create mod itself is not as heavy as kitchen-sink packs, but Create-focused modpacks often bundle 100-200 companion mods.

Vanilla Create (single mod): Adds roughly 500 MB overhead to the server
Create-based modpack: 4-8 GB depending on companion mods
Contraptions (moving multi-block machines) are CPU-intensive rather than RAM-intensive. You may find CPU limits before RAM limits on heavily contraption-driven servers.

SkyFactory 4 / SkyFactory 5

SkyFactory packs are progression-heavy skyblock experiences with many automation mods.

SkyFactory 4: 6-8 GB server RAM, up to 10 GB for 15+ players
SkyFactory 5: Similar range, though SF5 uses a cleaner mod selection than SF4
End-game automation setups can stress both RAM and CPU as players build complex item processing networks.

Java Edition vs. Bedrock Edition: RAM Differences Explained

The fundamental difference between Java and Bedrock server memory usage comes down to the runtime environment.

Java Edition runs inside the Java Virtual Machine. The JVM uses a managed heap, meaning it allocates a block of memory upfront (defined by your -Xms and -Xmx JVM flags) and manages objects within that space. Because all objects must be tracked for garbage collection, Java servers tend to use more RAM than an equivalent native application would.

The JVM’s garbage collector also means that Java servers benefit from having headroom above their working memory usage. If your server is consistently using 95% of its allocated heap, GC pauses become frequent and severe. Aim to keep average usage below 75% of the allocated maximum.

Bedrock Edition servers (official Bedrock Dedicated Server, or community software like PocketMine-MP) are native applications. They do not use a managed heap and therefore use memory more efficiently. A Bedrock server hosting 20 players might use 800 MB where a Java server with the same player count uses 2-3 GB.

The tradeoff is that Bedrock servers have fewer customization options and a smaller plugin ecosystem compared to Java-based Paper or Spigot servers.

Why More RAM Is Not Always the Answer

This is one of the most misunderstood aspects of Minecraft server performance. Allocating 32 GB of RAM to a server that only needs 4 GB can actively hurt performance.

Here is why:

Garbage collection scales with heap size. Modern Java garbage collectors (G1GC, ZGC, Shenandoah) must periodically scan the entire heap to identify and reclaim unused objects. The larger the heap, the longer a full GC scan takes. A server allocated 32 GB that only uses 4 GB may experience longer GC pauses than one allocated exactly 6 GB.

CPU is often the real bottleneck. Minecraft’s main game loop runs on a single thread. This means all chunk ticking, entity AI, redstone processing, and plugin event handling happens sequentially on one CPU core. No amount of RAM can fix a single-thread CPU bottleneck. If your TPS is low despite having plenty of free RAM, the problem is CPU, not memory. Use our TPS Calculator to estimate expected performance based on your hardware.

Disk I/O matters for chunk loading. When players explore new areas, the server reads chunk data from disk. On a slow disk (especially network-attached storage on oversold hosts), chunk loading causes lag regardless of how much RAM is available.

For most servers under 50 players, 4-8 GB of RAM with a fast CPU is the right allocation. Focus on CPU single-thread performance and optimized server software (Paper, Purpur) before reaching for more RAM.

JVM Flags and Garbage Collection: Aikar’s Flags Explained

Aikar’s flags are a set of JVM startup arguments developed by the Paper project maintainer Aikar, specifically tuned for Minecraft servers. They configure the G1 Garbage Collector to minimize pause times and produce more predictable performance.

Here are the standard Aikar’s flags for a server allocated 6 GB of RAM:

java -Xms6G -Xmx6G \
  -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

What each key flag does:

-Xms6G -Xmx6G: Sets minimum and maximum heap to the same value. Matching these prevents the JVM from dynamically resizing the heap, which avoids additional GC pressure during resize events.
-XX:+UseG1GC: Enables the G1 (Garbage First) garbage collector, which is designed for low-pause-time workloads.
-XX:MaxGCPauseMillis=200: Tells G1 to target a maximum pause time of 200 ms. This is a hint, not a guarantee.
-XX:G1HeapRegionSize=8M: Sets G1 region size to 8 MB, appropriate for Minecraft’s allocation patterns.
-XX:InitiatingHeapOccupancyPercent=15: Starts concurrent GC cycles earlier, when the heap is only 15% occupied, to avoid stop-the-world pauses at high occupancy.
-XX:+AlwaysPreTouch: Pre-allocates the entire heap at startup, preventing memory mapping delays during play.
-XX:+DisableExplicitGC: Prevents plugins from triggering System.gc(), which can cause unnecessary full GC pauses.

For servers running Java 21 with over 12 GB allocated, consider switching to ZGC instead of G1GC:

java -Xms12G -Xmx12G \
  -XX:+UseZGC \
  -XX:+ZGenerational \
  -jar server.jar nogui

ZGC is a concurrent, low-latency collector that keeps pause times under 1 ms in most cases, making it excellent for large modded servers.

Signs Your Server Needs More RAM

These are the observable symptoms that indicate insufficient RAM allocation:

Frequent TPS drops despite low player count. If your server drops below 20 TPS regularly with fewer players than the hardware should handle, and CPU usage is moderate, GC pressure from a too-small heap may be the cause.

Long startup times. Servers with insufficient RAM take longer to initialize because the JVM must perform garbage collection during the mod/plugin loading phase.

OutOfMemoryError crashes. These appear in the server log as java.lang.OutOfMemoryError: Java heap space. This is a definitive sign the heap is too small.

Excessive GC log output. If you enable GC logging (-Xlog:gc*) and see dozens of GC events per minute, the server is memory-constrained.

Chunk loading delays. Players may see slow chunk rendering as the server struggles to hold enough chunks in memory simultaneously.

Plugin cache misses. Some plugins log cache performance. Consistently low cache hit rates indicate the server cannot maintain adequate in-memory data.

How to Monitor RAM Usage

The Spark Plugin (Recommended)

Spark is the gold-standard profiling tool for Minecraft servers. Install it as a plugin (Paper/Spigot) or mod (Fabric/Forge) and use the following commands:

/spark heapsummary

This generates a snapshot of current heap usage broken down by object type, showing exactly which systems are consuming the most memory.

/spark profiler --timeout 30

This runs a 30-second CPU and memory profiler and generates a shareable report at spark.lucko.me. It can identify which plugins or mods are responsible for high memory allocation rates.

The /tps Command

The /tps command (available on Paper, Spigot, and most modded servers via a plugin) shows your server’s tick rate. While TPS primarily reflects CPU load rather than RAM, a correlation between TPS drops and high memory usage is a useful diagnostic signal.

A healthy server shows TPS: 20.0, 20.0, 20.0 (for 1-minute, 5-minute, and 15-minute averages). Values below 19 indicate performance pressure.

Java Process Memory

To see total memory used by the server process from the operating system level, use:

# Linux
ps aux | grep java

# Or for a live view
top -p $(pgrep -f server.jar)

The RES column shows resident set size, which is the actual physical RAM the process is using. Compare this to your -Xmx allocation to understand your headroom.

Spark Memory Report

Running /spark gcmonitor activates live GC monitoring that logs pause events to the console as they happen:

GC pause of 45ms (G1 Young Generation) - Heap: 3.2GB -> 2.1GB

Pauses under 100 ms are acceptable. Pauses over 200 ms will cause players to notice brief freezes, and pauses over 500 ms are severe enough to cause TPS drops.

Choosing a Host: What to Look For Beyond RAM Numbers

When comparing Minecraft hosting providers, the advertised RAM is only one part of the equation. An oversold host that gives you 8 GB of shared RAM on an overloaded node can perform worse than a host offering 4 GB of genuinely dedicated resources.

Key factors to evaluate:

Dedicated vs. shared resources: Confirm whether RAM and CPU are dedicated to your instance or shared with other customers on the same node.
CPU generation and clock speed: Minecraft benefits from high single-thread performance. Modern CPUs (AMD Ryzen 5000/7000 series, Intel Core 12th gen and above) significantly outperform older server chips for Minecraft workloads.
NVMe storage: Chunk loading performance depends on disk speed. NVMe SSDs load chunks much faster than SATA SSDs or spinning drives.
Server location: Network latency between your players and the server matters as much as hardware. A server in Singapore is ideal for Southeast Asian players.

CraftRift runs servers in Singapore on dedicated resources, meaning your allocated RAM and CPU are not shared with other customers. Plans start at $3/month for 2 GB, which covers most small vanilla or lightly-modded setups. Compare hosting prices with our Cost Calculator or see our full Minecraft hosting plans.

Frequently Asked Questions

Can I run a Minecraft server with 1 GB of RAM?

Yes, but only for vanilla or very light setups with 1-3 players. At 1 GB, you have almost no headroom and will hit GC pressure quickly. For anything beyond solo or duo play, 2 GB is the realistic minimum.

Should I set -Xms and -Xmx to the same value?

Yes. Setting both to the same value prevents the JVM from dynamically resizing the heap. Heap resizing triggers GC events and adds unpredictability to server performance. Always match them.

Does RAM affect ping?

No. Ping (network latency) is determined by the physical distance between the player and the server, plus network routing quality. RAM affects TPS (server-side performance) only. If your players have high ping despite a well-resourced server, the issue is geographic distance, not hardware.

How much RAM does a BungeeCord or Velocity proxy need?

Proxy software is very lightweight. A BungeeCord or Velocity instance typically uses 256-512 MB of RAM regardless of player count. Allocate no more than 512 MB to the proxy and put remaining resources into the backend server nodes.

How often should I restart my Minecraft server?

Most server operators restart every 12-24 hours to clear accumulated garbage from the JVM heap and reset any memory leaks introduced by plugins. Automated restarts via a startup script or panel scheduler are standard practice.

Does increasing view distance increase RAM usage?

Yes, significantly. Each additional chunk ring loaded around a player requires the server to hold more terrain data in memory. Doubling view distance from 8 to 16 can increase RAM usage by 40-60%. Keep view distance at 8-10 for most servers and use Paper’s no-tick-view-distance setting to provide a wider visual range without fully ticking distant chunks.

What Java version should I use?

For current Minecraft versions (26.1 and the corresponding server software builds), Java 21 is recommended. It includes improvements to the ZGC garbage collector and better virtual thread support. Java 17 is the minimum for recent versions. Avoid Java 8 for anything beyond legacy server software.

Is 8 GB enough for a 50-player Paper server?

For a standard survival server with a moderate plugin load, yes. Apply Aikar’s flags, keep view distance at 8-10, and use Paper’s entity and chunk configuration to limit unnecessary load. Monitor with Spark and adjust if you see consistent GC pressure.

Summary

Picking the right RAM allocation for a Minecraft server comes down to three factors: server type, player count, and mod or plugin complexity. Start with the recommendation table in this guide, apply Aikar’s JVM flags, and use Spark to verify your actual usage before upgrading.

Remember that RAM is only one dimension of server performance. A fast single-thread CPU and low-latency NVMe storage often matter more than raw memory, especially for servers under 50 players. Monitor your TPS and heap usage regularly, and upgrade when you consistently see memory pressure rather than guessing upfront.

For players in Southeast Asia, CraftRift offers dedicated-resource plans starting at $3/month with Singapore-based infrastructure, keeping latency low for the region while giving you full control over JVM flags and server configuration.