Out of memory Error: Java Heap Space

[mrkirby173]

I put together this monster pack for my friends and I (170 ish mods) but one of my friends is having issues loading the modpack. He is crashing with the out of memory error: Java Heap Space about 5 or so mins into the loading process. I don't understand why he is having this error. He is running Technic with 3 gigs of RAM and it crashes. I also can run it with 3 gigs of RAM but it loads fine for me O.o. He has an Intel i5 at 2.4GHz and 4 GB of ram. This is really confusing. If anyone is interested I have an Intel i5-4670 @ 3.4GHz

[plowmanplow]

Short answer: If you are trying to run a modpack with 170 mods on a system with only 4G of ram, you are going to have a bad time.

 

Long answer: That many mods will require a ton of permgen space. That, combined with varying system overhead for Windows and other programs will require you to be very aggressive in making sure that your system is as finely tuned as possible and not running anything but the Launcher/MC. You might have better luck reducing the amount of RAM allocated in the launcher on his system. Try dropping by 2.5G and trying it again, then down to 2G and seeing if you can run it.

[mrkirby173]

Short answer: If you are trying to run a modpack with 170 mods on a system with only 4G of ram, you are going to have a bad time.

 

Long answer: That many mods will require a ton of permgen space. That, combined with varying system overhead for Windows and other programs will require you to be very aggressive in making sure that your system is as finely tuned as possible and not running anything but the Launcher/MC. You might have better luck reducing the amount of RAM allocated in the launcher on his system. Try dropping by 2.5G and trying it again, then down to 2G and seeing if you can run it.

Okay I'll let him know but the launcher does not have a 2.5G option for the amount of RAM. Also we were scree sharing via Skype so that might have also been an issue. Going further with my investigation, I found that another one of my friends can load the pack just fine with 1 GB of RAM but crashes because he's out of permgen space which can be fixed by setting the memory to 2 GB. WHY DID THEY REMOVE THE INCREASE PERMGEN OPTION?

Edited April 5, 2014 by mrkirby173