eclipse 启动不起来（不能创建VM）

Specifying the Java virtual machine
Here is a typical Eclipse command line: 

eclipse -vm c:jdk1.4.2jreinjavaw

Tip: It's generally a good idea to explicitly specify which Java VM to use when running Eclipse. This is achieved with the "-vm" command line argument as illustrated above. If you don't use "-vm", Eclipse will look on the O/S path. When you install other Java-based products, they may change your path and could result in a different Java VM being used when you next launch Eclipse.

To create a Windows shortcut to an installed Eclipse:

Navigate to eclipse.exe in Windows Explorer and use Create Shortcut on the content menu. 
Select the shortcut and edit its Properties. In the Target: field append the command line arguments. 
Opening this shortcut launches Eclipse. (You can drag the shortcut to the Windows Desktop if you want to keep it in easy reach.)

意思是指定自己的jvm，按照上面，在eclipse.ini的开头加上：

-vm
$JAVA_HOMEinjavaw.exe // win下是""

或者将

--launcher.XXMaxPermSize
256M

--launcher.XXMaxPermSize
256m

// 改为

--launcher.XXMaxPermSize
128M

--launcher.XXMaxPermSize
128m