Question 1

How to upgrade your Minecraft server to 1.21.11

Accepted Answer

Updated for the Mounts & Mayhem Release. Read the full changelog.

Minecraft version 1.21.11 introduces new features, bug fixes, and improvements — and updating your Serverwave server takes only a few minutes. This guide explains every method to upgrade, whether you’re using Vanilla, Paper, Purpur, Fabric, Forge, or a custom jar. This tutorial works for:

Minecraft Java Edition 1.21.11
Paper 1.21.11
Purpur 1.21.11
Fabric / Quilt 1.21.11
Forge 1.21.11 (when available)

* Custom jar files

Why Update to Minecraft 1.21.11?

Players search for this update because it includes:

Mounts & Mayhem features and fixes
Spear combat improvements
Performance and stability updates
Updated mob behavior
Snapshot → Release version corrections

If you want your players to enjoy the latest mechanics, upgrading is essential.

How to Update Your Serverwave Server to Minecraft 1.21.11

Serverwave gives you multiple ways to upgrade your server depending on how you run it. Choose the method that applies to your setup.

What You Need

The 1.21.11 server.jar from a trusted source (e.g., Mojang, PaperMC, Purpur, Fabric installer output).

| We recommend downloading your jars from https://jarvault.server

Question 2

How to claim your $3 free signup bonus

Accepted Answer

Starting your journey with Serverwave just got even better. We’re giving every new user a free $3 signup bonus — no strings attached. You can use it to launch your first game server, test our Dynamic Billing system, or simply explore everything Serverwave has to offer.

How It Works

It’s simple:

All you need to do is register an account on our dashboard and the credits are automatically added to your account, no credit card required.

What You Can Do With Your Bonus

Your free credit works just like regular balance — you can use it for:

Spinning up Minecraft, Palworld, Valheim, or other game servers.
Testing Dynamic Billing and seeing how hourly usage works in real time.
Trying out features like Automatic Top-Ups or PanelWave’s control tools.

There’s no expiration date, so you can use your bonus whenever you’re ready.

Step-by-Step

Create an account on the Serverwave Dashboard
Enjoy your $3 credit, automatically added to your account. 🎉

A Few Things to Know

The $3 bonus is available once per new account.

* Bonus credit can’t be withdrawn or refunded, but it can be used on any service.

Final Thoughts

We built Serverwave to make hosting simple, transparent, and fun — and this is our way of helping you get started risk-free. So

Question 3

How to import your server from other providers to Serverwave

Accepted Answer

Switching to Serverwave is quick and easy — you can migrate your existing game server from another host in just a few steps. This guide will walk you through how to transfer your files and get your server up and running on Serverwave.

What You’ll Need

Before starting, make sure you have:

|| If you don't know how to use SFTP, check out our guide on how to use SFTP

Step 1: Download Your Server Files

Log in to your previous hosting provider’s panel.
Locate your SFTP or File Manager.
Download your entire server folder — including:
- world or save folders
- Configuration files (e.g., server.properties, settings.json)
- Plugin or mod folders (e.g., /plugins or /mods)

4. Save these files somewhere easy to find on your computer.

Step 2: Upload Your Files to Serverwave

Now it’s time to upload those files to your new server.

Open your SFTP client.
Connect to your Serverwave server using your SFTP details (found in the Control Panel).
Navigate to your server directory
U

Question 4

How to Use Spark Profiler to Diagnose Minecraft Server Lag & Performance

Accepted Answer

What Is Spark?

Spark is a performance profiling plugin/mod for Minecraft servers (Forge, Fabric, or Bukkit/Spigot-based) that helps you diagnose lag, memory issues, TPS drops, and other bottlenecks.

Key features:

Real-time TPS / MSPT / CPU / memory monitoring
Profiling of server threads, method calls, and memory allocations
Heap dumps / memory summaries / GC info
Web-based viewer that presents the profiling data in a readable format

Spark is widely used by hosting providers to assist users with performance diagnostics.

Installation of Spark

The installation process depends on your server type (modded / plugin). Here’s how it’s typically done: | Server Type | Steps to Install | | ---- | | Spigot / Paper / Bukkit (plugin) | Download the Spark plugin JAR (from SpigotMC or official Spark) and place it in the plugins/ folder. | | Forge / Fabric (modded) | Download the Spark mod JAR version matching your Minecraft and mod loader version. Upload it to the mods/ folder. |

After placing the JAR, restart your server fully to activate Spark.

Basic Spark Commands & Usage

Once Spark is installed, you can use specific commands to profile and inspect server performance.

Common commands

| Command | Purpose | | --

Question 5

How to Install a Custom Server Jar on Your Minecraft Server

Accepted Answer

Want to run a custom version of Minecraft, a modded jar, or your own server build?

Serverwave makes it easy to upload and use a custom server jar, giving you full control over your setup.

What Is a Custom Server Jar?

A server jar is the main file that runs your Minecraft server — examples include:

paper.jar for Paper servers
forge-1.20.1.jar for Forge modded servers
fabric-server-launch.jar for Fabric
Or your own custom-compiled jar By uploading a custom jar, you can:
Run custom server types or forks (e.g. Purpur, Mohist, Arclight)
Use specific mod or plugin versions

* Host experimental builds or private versions

What You’ll Need:

Your custom .jar file ready (from a trusted source).
Access to your Serverwave Control Panel.
SFTP or File Manager access.
Your server is fully stopped before changing jars.

|| Need help connecting via SFTP? See our guide: How to Use SFTP on Serverwave

Stop Your Server In the panel, click Stop and wait until the server status shows Offline.
Upload Your Custom Jar Option 1: Via File Manager: Go to File Manager → Upload, select your .jar, and place it in the root directory (same folder as server.properties). Option 2: SFTP (Alternative): Connect via SFTP → Upload the .jar to the root

Question 6

How to manage files using SFTP

Accepted Answer

SFTP (Secure File Transfer Protocol) lets you upload, download, and manage your game server files securely. It’s the recommended way to handle large files, backups, or advanced configuration changes.

What You’ll Need

Before connecting, make sure you have:

* Your server’s SFTP details, found in the Control Panel.

Finding Your SFTP Details

Log in to the Serverwave Control Panel.
Open your server.
Click on the “SFTP Credentials” button in the header, next to your server controls (or at File Manager → SFTP Credentials).
Copy the following information:
- Host: (e.g. sftp.serverwave.com)
- Port: usually 2022
- Username

* Password

Connecting via FileZilla (Example)

Open FileZilla.
Click File → Site Manager → New Site.
Set the following:
- Protocol: SFTP – SSH File Transfer Protocol
- Host: paste your SFTP host
- Port: 2022
- Logon Type: Normal
- User / Password: use the credentials from your panel
Click Connect. Once connected, you’ll see your server f

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