I've been using MultiMC for years, and I've always added more memory allocation by going into an instance, going to settings, selecting "memory" and changing the maximum allocation to something like 4000. Recently, that hasn't worked, and has in fact prevented any instance in which I do this from launching. (I've also increased the PermGen, but that doesn't seem to affect whether or not the game can launch)
EDIT: I tried lowering the memory allocation to 1000 something, and the game will launch, but in the middle of playing, it will freeze for a moment before displaying this in the chat:
I've been using MultiMC for years, and I've always added more memory allocation by going into an instance, going to settings, selecting "memory" and changing the maximum allocation to something like 4000. Recently, that hasn't worked, and has in fact prevented any instance in which I do this from launching. (I've also increased the PermGen, but that doesn't seem to affect whether or not the game can launch)
EDIT: I tried lowering the memory allocation to 1000 something, and the game will launch, but in the middle of playing, it will freeze for a moment before displaying this in the chat:
http://imgur.com/a/iO3mx
After that message appears in chat, the game will continuously freeze while repeating that message in chat.
Here is the launching code when I try to play with 4096 as my maximum allocation:
MultiMC version: 0.4.11-751
Minecraft folder is:
instances/Vanilla 1.7.10/minecraft
Java path is:
C:/ProgramData/Oracle/Java/javapath/java.exe
Java Arguments:
[-XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump, -Xms512m, -Xmx4096m, -Duser.language=en, -jar, C:/Users/Will Bouhuys/Desktop/MISC/mmc-stable-win32/MultiMC/jars/NewLaunch.jar]
Minecraft process ID: 19928
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
Invalid maximum heap size: -Xmx4096m
The specified size exceeds the maximum representable size.
Process exited with code 1.