> ## Documentation Index
> Fetch the complete documentation index at: https://help.freakhosting.com/llms.txt
> Use this file to discover all available pages before exploring further.

# How to Determine RAM Requirements for Modded Minecraft

> Sizing your performance for modpacks. Learn how to calculate the ideal RAM allocation based on modpack complexity, player count, and world generation.

## Sizing Your Performance

Selecting the appropriate volume of Random Access Memory (RAM) is the most critical technical decision for ensuring a smooth, jitter-free modded experience. While the "more is better" philosophy is prevalent, over-allocation can occasionally lead to prolonged Java Garbage Collection (GC) pauses, causing intermittent server freezes. This guide helps you identify the technical "sweet spot" for your community by analyzing modpack complexity and player density scaling.

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  <Card title="Difficulty" icon="gauge-low">
    Beginner
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  <Card title="Time" icon="clock">
    5 Minutes
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## Modpack Complexity Tiers

The baseline memory footprint of your server is determined by the specific modloader (Forge, NeoForge, or Fabric) and the total volume of registered assets and block states.

| Complexity Tier           | Example Modpacks                           | Recommended RAM    |
| :------------------------ | :----------------------------------------- | :----------------- |
| **Light (Vanilla+)**      | FTB Lite, Better Minecraft \[Fabric]       | **3 GB - 4 GB**    |
| **Medium (Kitchen Sink)** | All the Mods 9, Stoneblock 3, Enigmatica   | **6 GB - 8 GB**    |
| **Heavy (Expert/Tech)**   | RLCraft, GregTech New Horizons, SkyFactory | **10 GB - 12 GB+** |

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## Strategic Player Scaling

As players explore diverse dimensions (The End, Twilight Forest, etc.) and trigger new world generation, the demands on your memory pool increase dynamically.

* **Small Group (2-5 Players):** Baseline tier + **1 GB** overhead.
* **Medium Community (10-20 Players):** Baseline tier + **4 GB** overhead.
* **Large Network (30+ Players):** We recommend using a [Proxy Architecture](/games/minecraft/setting-up-bungeecord-velocity-proxy-network) to distribute the load across multiple physical server instances.

***

## Optimization Protocols

Implementing these technical best practices can significantly reduce your RAM requirements and improve overall stability.

<AccordionGroup>
  <Accordion title="World Pre-Generation (Chunky)">
    Most "Can't keep up" errors occur during real-time world generation. By using the **Chunky** plugin/mod to pre-generate your world border during off-peak hours, you eliminate the CPU and RAM spikes associated with dynamic terrain calculation.
  </Accordion>

  <Accordion title="Aikar's Garbage Collection Flags">
    Managing how Java reclaims unused memory is important. FREAKHOSTING uses optimized JVM startup flags by default, which prioritize short, frequent collection cycles over long, impactful pauses.
  </Accordion>

  <Accordion title="Technical Profiling (Spark)">
    If your server experiences lag while RAM usage appears low, use the **Spark** profiler (`/spark profiler`). This tool provides a granular breakdown of whether your performance bottleneck is actually related to entity AI, ticking tiles, or network throughput.
  </Accordion>
</AccordionGroup>

<Tip>
  ### Dynamic Scaling

  If you find your community is outgrowing its current resources, you can [Upgrade Your RAM](/portals/billing/how-to-upgradedowngrade-your-service) instantly via the FREAKHOSTING Billing Panel without any data loss or manual migration required.
</Tip>

***

<Note>
  ### Need Extra Help?

  If you encounter any issues, our support team is ready to assist:

  * **Live Chat:** Quick assistance via our website.
  * **Support Ticket:** [Open a Ticket](https://freakhosting.com/clientarea/submitticket.php)
  * **Discord:** [Join our Community](https://discord.gg/freakhosting)
  * **Email:** [support@freakhosting.com](mailto:support@freakhosting.com)
</Note>

<Tip>
  ### Save on Your Hosting

  Ready to get a new server? Use code **KB20** at checkout for **20% off** your first month!
</Tip>

***

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  **Last Updated:** January 2026 | **Performance:** Peak efficiency.
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