Changing Servers JVM Arguments
When you create a server, by default there is usually no JVM arguments set. If you want to set them up, it will depend on how the server was created.
For CurseForge Modpacks
In order to change the JVM arguments for CurseForge modpacks, you will need to contact the modpack creator for support with how to change the JVM arguments for their server.
As CurseForge modpacks are uploaded by the modpack creator themselves, we have no way of knowing how to change the JVM arguments for their servers.
You may try looking in the server folder for some sort of readme file or some other documentation that may help you, but failing that, please contact the modpack creator for support.
For Everything Else
You can change the JVM arguments by going to the Servers tab in the launcher and then clicking the “Open Folder” button:
In the folder that opens, you can look for the LaunchServer script. In Windows you want the LaunchServer.bat file,
for Linux/OSX you want the LaunchServer.sh file.
For Windows
Once you’ve found the LaunchServer.bat file (note that it may just be shown as LaunchServer if you have file
extensions turned off), you can open it in Notepad. You can also right click the file and click the Edit in Notepad
option if it shows:
In order to change the JVM arguments used when launching the server, look for the line near the top of the file that
says set jvmargs="":
You can put anything in the middle of the double quotes and that will be used when starting the Minecraft server. For instance to add a initial memory size of 1GB, it would look like below:
Save the file and then next time you start the server it will use the new JVM arguments.
For Linux/OSX
Once you’ve found the LaunchServer.sh file you can open it in any text editor. Then look for the line near the top of
the file that says JVMARGS="":
You can put anything in the middle of the double quotes and that will be used when starting the Minecraft server. For instance to add a initial memory size of 1GB, it would look like below:
Save the file and then next time you start the server it will use the new JVM arguments.