Increasing the heap size on Eclipse-RAD

Question

I'm trying to increase the heap size on my RAD installation. When I make the changes, Eclipse isn't starting.

Current configuration...

-startup
plugins\org.eclipse.equinox.launcher_1.0.101.R34x_v20081125.jar
-install
C:\Program Files\IBM\SDP
--launcher.library
plugins\org.eclipse.equinox.launcher.win32.win32.x86_1.0.101.R34x_v20080731
-vm
jdk\jre\bin\j9vm\jvm.dll
-vmargs
-Xquickstart
-Xms128m
-Xmx1024m
-Xmnx64m
-Xgcpolicy:gencon
-Xscmx96m
-Xshareclasses:name=IBMSDP_%u
-Xnolinenumbers
-XX:MaxPermSize=128M
-Dcom.ibm.ws.management.event.max_polling_interval=1000

I have changed startup to 256m and max to 1536m. With that change, Eclipse won't even start and I get this error.. Eclipse startup error

Can someone explain what this means and how I can properly increase the memory? Thanks!

@nitind.. "current configuration" is the content of eclipse.ini file.. I was trying to modify Xms and Xmx in that file.. — RKodakandla, Apr 22 '13 at 15:35
It seems that you have a 32-bit os. Can you try starting with Xmx1024 or less? — trikelef, Apr 23 '13 at 07:37

score 0 · Answer 1 · answered Apr 23 '13 at 06:26

It's not about Eclipse, the virtual machine itself refused to come up. Possible reasons are:

The xmx range is limited by the physical and available memory. So closing other running applications increase the chance to run this JVM with the increased settings.
Some of the other JVM configuration options might be in conflict with that increased memory setting. I would therefore try to remove the other -X... arguments, while fiddling with the -Xmx option. If that succeeds, reintroduce the other arguments one by one to see where the conflict occurs.

score 0 · Answer 2 · answered May 18 '18 at 19:06

I frankly don't know the real reason but.. I just read about it here http://www.strongback.us/2012/01/increasing-the-jvm-heap-for-rsa-rad-and-other-rational-or-eclipse-products

Here is the excerpt from above link.

You also MUST update the line

-vm ‘install directory’jdkjrebinj9vmjvm.dll to -vm ‘install directory’jdkjrebinjavaw.exe

Otherwise, it will not respect the variables and WILL crash your Eclipse instance.

PS: This solution or problem I've not experienced/tested myself.

Thanks, Sameer Nafdey

Increasing the heap size on Eclipse-RAD

2 Answers2