Eclipse.ini文件的VM参数示范例子
One of the most recommended options to use is to specify a specific JVM for Eclipse to run on. The following eclipse.ini demonstrates correct usage of the -vm option (for a Windows system):

-showsplash

org.eclipse.platform

--launcher.XXMaxPermSize

256m

-vm

C:/Java/JDK/1.5/bin/javaw.exe

-vmargs

-Xms40m

-Xmx512m


On a Linux system, the file looks quite similar:

-showsplash

org.eclipse.platform

--launcher.XXMaxPermSize

256m

-vm

/opt/sun-jdk-1.6.0.02/bin/java

-vmargs

-Xms40m

-Xmx512m



On a Mac OS X system, to specify Java 6:

-showsplash

org.eclipse.platform

--launcher.XXMaxPermSize

256m

-vm

/System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Home/bin/java

-vmargs

-Xms40m

-Xmx512m


Note the format as it is important to be exact:

The -vm option and its value (the path) must be on separate lines.
The value must be the full absolute path to the Java executable, not just to the Java home directory.


(copy from http://wiki.eclipse.org/Eclipse.ini)