How to Fix the "OutOfMemoryError: Java Heap Space" Error

Hello, PixelHost Community! 👋

Today, we’re going to discuss something crucial for those starting in the world of Minecraft server administration: the amount of RAM allocated to your server! 🧠💾

The Importance of RAM for Your Minecraft Server 🖥️

When setting up a Minecraft server, one of the first things to consider is the amount of RAM allocated to it. Many new administrators aren’t aware that Minecraft servers can require a significant amount of RAM just to start. 🤯

Memory Errors 🛑

One of the most common issues you might encounter is the "OutOfMemoryError: Java Heap Space" error. This error indicates that your server ran out of memory (RAM) either during startup or while it was running. The nature of this error is straightforward: you don’t have enough RAM to run the server, or you ran out of RAM while the server was loading its processes. 😨

⚠️ Common Issue: The server freezes or stops while trying to load everything.

✔️ Solution: First, you need to determine if you have enough RAM to start the server. 💻 During the pre-initialization phase (startup), the server uses the most RAM simultaneously as it loads all necessary files. 📁 If you encounter this error before the "Startup completed" message appears and confirms that the server is online, then your server likely needs more RAM to start. 📈

❗ Suggested Actions ❗

• Upgrade Your Server Plan: If you’re on a basic plan, you might need more resources. 🌟

• Reduce the Server’s Intended Function: If you’re trying to run a modded server with only 512 MB or 1 GB of RAM, consider scaling it down to something less intensive, like a Bukkit or Vanilla server.

Server Starts but Then Stops? 🚦

If your server starts and you can connect to it but then it stops with the "OutOfMemoryError: Java Heap Space" error, it means your server ran out of RAM. This error is common in servers that barely manage to load the files while trying to handle additional loads.

⚠️ Common Issue: The server stops when players connect, or when many chunks, mobs, items on the ground, plugins, and anything else the server needs to process are loaded.

✔️ Solution: The solution may involve increasing the available RAM or reducing the load on the server (fewer players, fewer mods/plugins).

❗ Suggested Actions ❗

• Monitor RAM Usage: Use monitoring tools 🖥️ to identify when and where the RAM is running out. 🔍

• Optimize the Server: Remove unnecessary mods or plugins, adjust mob spawn settings, and limit the number of chunks/entities loaded simultaneously. ⚙️

We hope these tips help you keep your Minecraft server running smoothly. Remember, at PixelHost, we’re here to support you every step of the way. Happy hosting, and may the RAM always be in your favor! 🚀💖

If you have any questions, join the PixelHost Discord 🚀Follow us on Twitter (@PixelProHosting) to stay up to date.

Best Regards to all!

João @PixelHost.