Minecraft Forums

hello guys , PLEASE I need help !!!

I have 4GB Ram in my PC , and when I go to java setting and change

-Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M

to 

-Xmx2G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M

Make it 2GB to make it not lagging , I got crash in it

Error occurred during initialization of VM
Could not reserve enough space for 2097152KB object heap
Java HotSpot(TM) Client VM warning: Using incremental CMS is deprecated and will likely be removed in a future release

You definitely have 32bit Java, and 2G is not a legal choice. It will blow up somewhere around 1500M with 32bit.

You need 64bit to go higher and that requires a 64bit OS as well.

okay thanks , but when i open minecraft with 1400M , I got crash too , and I get this picture :

and in Game output I get this text

Invalid maximum heap size: -Xmx1400M-XX:+UseConcMarkSweepGC

until if I make it 1G or 1024 MG

Quote from grimallq»

You are running the game with 32bit Java. That can't use more then 1.5GB RAM, and anything above 1GB depends heavily on luck and OS state.

You need to install and switch over to 64bit Java or you WON'T be able to use more then 1GB RAM reliably (with an absolute max of 1.5GB). Period.

Quote from grimallq»

Which part of "change Java version or you will keep having issues" is hard to get?

Quote from SuperNighty»

Invalid maximum heap size: -Xmx1400M-XX:+UseConcMarkSweepGC