Serious lag problems

[YogSothoth]

New to the forums and technic, and I'm having issues running any of the modpacks. They'll run fine, up to a certain point, and then it's like 1 frame every minute. I suspect it might be my RAM, but the launcher will only let me allocate up to 1GB of RAM for some reason, even though I've heard it's supposed to allow you to allocate up to 8 or 16GB. Any suggestions? Perhaps RAM isn't the issue?

[Flextt]

You should try installing OptiFine (maybe suffering from Lagspike of Death, if that is still a thing) or avoid putting too many machinery in a single area of chunks.

[YogSothoth]

What's the Lagspike of Death? Also, I've noticed it starts to happen when the map has to load, and if I can manage to save and quit to the title screen, when I try to play again it crashes. I've got a log of the error saved, should I post it here?

[Flextt]

Does Minecraft vanilla run on your spec?

[YogSothoth]

Yeah, vanilla runs just fine.

[TheBytemaster]

I suspect it might be my RAM, but the launcher will only let me allocate up to 1GB of RAM for some reason

32-bit java will do this. If your processor/OS is only 32-bit, nothing much you can do, but if you have a 64 bit OS then you should install 64-bit java. How much ram does your system have?

Also, I've noticed it starts to happen when the map has to load.

In this case, You might want to Pre-generate the map. Always post crash logs, preferably using the "code" tags.

[freakachu]

it does sound like a 32 bit vs 64 bit issue. I've seen similar issues when the game is launched using 32 bit java on a 64 bit machine. make sure you're using the right one.

[Lothos]

we need more information on your computer in order to provide adequate support. And NO, going straight to optifine is the worst first choice for solving any lag problem.