Minecraft Forums

Hey all,

I have a strange issue which I can't seem to figure out.

Intel i5-2400 cpu
Gskill 16gb ram
Radeon HD6870 gpu

Single Player, start game fps ranges between 20-60 depending where I am (machines, generating world etc etc) after about an hour I'll use the me crafting terminal or jump through a portal gun portal or something and suddenly the game halts for about 5 seconds hitting 0fps and not interacting with anything I'll be really low on frames, 5-8fps.

The f3 screen shows I'm using about 1gb of 3gb and java in system processes is using 2.5gb. It seems that the game runs fine until java hits 2.5gb of ram then it dies and starts with low fps for no particular reason.

The curious thing is in a multiplayer world on lan I can stay in his game for hours and I won't have the same issue, I haven't had a chance to analyse what his memory usages are over time.

I tried the -xmx4096 thing in java and it doesn't seem to have done anything at all.

Anyone come across this before? Appreciate any help ty

Well i installed ftb on another computer with my save files and instantly the java used 2.8g of ram on that one so I think there's something broke with my OS so I'm going to reinstall and see what it ends up looking like after that.

I already reinstalled windows and I don't appear to be having the same issue, however pc is sick at the moment so trying to sort that out first. I put those details into the java from control panel and tried it in the extra arguments from the ftb launcher and it did appear they did absolutely nothing heh. and no I didn't do anything with PermGen, not heard of that one.

I moved the slider, in game would say it used 1. something (can't remember exactly) of 4gb yet java itself would stay stuck at 2.5, there was something broke, it's no longer broke and I also wrote it correctly in java itself, I copied it from a sticky page here, i just didn't add the m in this thread.