Allocating too much RAM can actually overload your CPU and cause lag spikes due to more garbage collection. So it could, in fact, actually DECREASE performance.
Assuming user do have 8 or 16 GB RAM, its not going to hurt any performance. (generally picking right GC args can solve lag spikes)
Hey I'm new to editing this and I'm trying to play on your guys server.
What in the god's name you need that much RAM to just play a vanilla server? 1 GB is ideal and 2 GB RAM is more then enough even on graphics.
-Xmx1G -Xms1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -client
Btw, I use this args for in my PC, with lowest graphic settings and my system have only total of 4 gb RAM, and as you can see that arguments, out of 1 gb (-Xmx1G), all 1GB allocate always (Xms1G), but only 400 MB in used always.
for more info about system optimization, see this tutorial http://forums.teamex...updated-221017/