Qual limite de memória que posso alocal para o eclipse no eclipse.ini?

Meu eclipse.ini:

-startup
plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar
–launcher.library
plugins/org.eclipse.equinox.launcher.win32.win32.x86_1.1.300.v20150602-1417
-vm
C:/Program Files (x86)/Java/jdk1.8.0_131/bin/javaw.exe
–launcher.library
C:\MV\ides\eclipse\plugins\org.eclipse.equinox.launcher.win32.win32.x86_1.1.300.v20150602-1417
-startup
C:\MV\ides\eclipse\plugins\org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar
-startup
C:\MV\ides\eclipse\plugins\org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar
–launcher.library
C:\MV\ides\eclipse\plugins\org.eclipse.equinox.launcher.win32.win32.x86_1.1.300.v20150602-1417
-product
org.eclipse.epp.package.jee.product
–launcher.defaultAction
openFile
–launcher.XXMaxPermSize
256M
-showsplash
org.eclipse.platform
–launcher.XXMaxPermSize
256m
–launcher.defaultAction
openFile
–launcher.appendVmargs
-vmargs
-Dosgi.requiredJavaVersion=1.7
-Xms1024m
-Xmx1024m

Já rodei com 2048m