Java SE (Java Platform, Standard Edition)

Hi,

I try to give my App the MaxRAMFraction of about 80%. This is only possible by using 1.25 as VALUE:

-XX:MaxRAMFraction=1.25

I get this exception:

Improperly specified VM option 'MaxRAMFraction=1.25'

Error: Could not create the Java Virtual Machine.

Error: A fatal exception has occurred. Program will exit.

It will not work with 1,25 or any decimal number either. So it is impossible to give my app more than 50% available RAM? (only able to use 2 and all positive integers as VALUE successfully so far) I need to use this value and not -Xmx because I don´t know the amount of RAM my Client Computers will have.

Thanks for help,

Michael