Help with giving more RAM to a local hosted server

[Binary]

So I am very aware of how this is done, and I can't seem to find the issue.
A few things to note, i am using Java 8 64bit and I have 32GB of RAM in my PC. I have tried different bat scripts but this is the one i have been using, but it caps off at 1GB even though i have plenty of GB's of RAM

java -Xms1024M -Xmx1024M -jar spigot.jar
pause

If I try and increase that any more i get the following error:

Invalid initial heap size: -Xms6144M
The specified size exceeds the maximum representable size.
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

Any ideas on what could be causing this and how i could fix it?​

 

[Hannes]

The error you get means that you do not have enough memory on your computer to start with that much. Or atleast not free.

 

[Melon]

Yeah, as above, just make sure that you have available ram. If anything just restart your PC and try it again.

 

[CustomEnchants]

Make sure to have a 64 bit Java installed !

 

[Melon]

Make sure to have a 64 bit Java installed !

Yes, that definitely is a thing to look out for. The download you get usually from the Java site is only 32 bit. You have to go to https://www.java.com/en/download/manual.jsp to get them all (Offline installer (64 bit))

 

[Clyde]

32bit Java only supports a maximum of 1gb or 1024mb of memory of I am not mistaken, while 64bit supports as much ram as you can give it.