Worlds not playing

[EricNel10]

I've started a couple Attack of the B-Team worlds, and this has happened to every single one of them. But whenever I start a world it will work perfectly fine for a few days (or a few hours worth of game play). However, after a period of time, the world just randomly loses all fps, my rendering drops completely down to nothing, and I can barely move when I am anywhere near my home base (which is where i put and control all the mods and items I use), but whenever I teleport away from my base a couple chunks away (still within sight) everything works fine again. Anyone else having this problem? How do I fix it?

[codebracker]

This often happens to me, due to minecraft running out of memory. I can't fix it because I have 32-bit java, but if you have 64-bit java yoi can increase your ram usage above 1gb. If you can, try setting it to 2gb.

[EricNel10]

I already have it set to the highest of 7GB...