Running this pack on a new machine (i7-4771 w/16GB RAM) I am running into a java performance issue - framerate is fine (80 fps or so on this machine) but every second or so I get a lag spike when used memory (in the F3 view) hits about 85% - then it garabage collects down to 76% or so - then in a second it is back up to 85% and I get another lag spike. It always says "of 910MB" even though I have Xmx and Xms set to 2048M.
~ > java -version
java version "1.7.0_60"
Java(TM) SE Runtime Environment (build 1.7.0_60-b19)
Java HotSpot(TM) 64-Bit Server VM (build 24.60-b09, mixed mode)
I have tried this (what I used to run B&B on my other machine):
java -Xmx2048M -Xms2048M -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CICompilerCountPerCPU -XX:+TieredCompilation -jar /data/minecraft/ftb/ftb.jar
and this (which is what I use to run any other pack):
java -Xmx2048M -Xms2048M -XX:+UseFastAccessorMethods -XX:+AggressiveOpts -XX:+DisableExplicitGC -XX:+UseAdaptiveGCBoundary -XX:MaxGCPauseMillis=500 -XX:SurvivorRatio=16 -XX:+UseParallelGC -XX:UseSSE=3 -XX
arallelGCThreads=4 -jar /data/minecraft/ftb/ftb.jar
Same results either way. Any ideas?