Minecraft Forums

Hello! I tweaked the default JVM Arguments to improve my minecraft performance but I got this error when I changed it:

Invalid maximum heap size: -Xmx4G
The specified size exceeds the maximum representable size.

I changed "-Xmx1G" to "-Xmx4G"... Here are my full arguments:

-Xmx4G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M

Thanks in Advance!

@grimallq Yeah, already figured it out... but thanks

Full Instructions:

Step #1: Check if your OS is 64 bit

Step #2: Download & Install the latest 64 bit version of java: (link to webpage)

Step #3: Open your profile & change the path for Java:

Change path to: <System Drive>:\Program Files\Java\<latest version>\bin\javaw.exe

My path was:C:\Program Files\Java\jre1.8.0_71\bin\javaw.exe

And that's it!