Unable to increase java heap size

Krilledutten · February 4, 2017

So, I was trying to set up a modded server for minecraft in At Launcher when i discovered it would crash because of not enough memory. i googled it a bunch of times and thought i had a solution, but java was "ignoring" what i wrote in the CMD. Error i was getting:

java.lang.outofmemoryerror: java heap space

I was trying to fix it With:

java -Xmx2048m

-XX:MaxPermsize=4096M

but it would't let me. Any ideas of how i could edit the heap size? Preferebly without braking anything.

Unimportant · February 4, 2017

Try adding the 64bit flag:

-d64

Without it, the JVM runs in 32-bit with all the memory limitations that implies.

Assuming, ofc, that you are running a 64-bit OS, otherwise this won't work.

Fetzie · February 5, 2017

18 hours ago, Unimportant said:

Try adding the 64bit flag:

-d64

Without it, the JVM runs in 32-bit with all the memory limitations that implies.

Assuming, ofc, that you are running a 64-bit OS, otherwise this won't work.

And a 64bit jre, but I think that probably goes without saying