Memory Increase for Minecraft
This simple batch file launches Minecraft, but with the amount of memory specified in the batch file, not at the default 1GB amount. This helps eliminate the ?Out of Memory’ issues and other issues using high definition texture packs. It uses the concepts applied by server wrappers to manage jar files while providing a relatively smooth experience.
NOTICE! NOT RECOMMENDED FOR 32BIT COMPUTERS. IF YOU HAVE A 32BIT PC AND YOU HAVE AT LEAST 4GB OF RAM, TRY USING THE 1.25GB OR 1.5GB FILES FOUND IN THE FOLLOWING DIRECTORY: Windows > Minecraft.exe Client .bat Files > 64bit OS, 64bit Java directory.
If this does not work for you, edit the batch file to show the appropriate location and version of Java on your computer. To adjust the amount of RAM used, Xms is the minimum amount while Xmx is the maximum amount. (1,536MB = 1.5GB Ram, 2048MB = 2GB of Ram).