Minecraft Forums

After changing the JVM argument from 1G to 16G, all i get is this:

"Invalid maximum heap size: -Xmx16G
The specified size exceeds the maximum representable size."

and this is the argument:

-Xmx16G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M

could someone tell me what i'm doing wrong?

i did the same thing on my Win 7 system, and its works fine (60 fps, even with an HD texture pack)

16G? there's no way that you need that much memory.

But you certainly need 64bit Java to go above ~1.5G

Quote from HoztileManikyn»

After changing the JVM argument from 1G to 16G, all i get is this:

"Invalid maximum heap size: -Xmx16G
The specified size exceeds the maximum representable size."

and this is the argument:

-Xmx16G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M

could someone tell me what i'm doing wrong?

i did the same thing on my Win 7 system, and its works fine (60 fps, even with an HD texture pack)

Read this here before bothering to adjust your RAM again.

Also, make sure you have 64-bit Java installed.

TL;DR: Too much RAM and you get lag spikes thanks to the fact that more allocated RAM means more lazy workload on Java's garbage collector. Too little and the same thing happens since Java needs to try to make space for new stuff all the time. Try to find a good balance.

the balance for my system is 16GB, taking in to account, i like to record gameplay, (albeit, Fraps isn't TOO demanding)

it's just what i found works the best,

(BTW love that danasoft tracker)