Board Thread:LotR Mod Technical Support/@comment-62.241.127.225-20161128223711/@comment-27219153-20161201220817

So I got FTB Infinity 2.6.0 and added LOTR, MoCreatures and CustomMobSpawner. I loaded up a new singleplayer world and it took ~11GB. However, after being in game for several minutes, ram usage went down to ~4GB, but then upon leaving the game, ram usage spiked to ~10GB. From this, we can conclude that loading/unloading dimensions causes massive ram spikes with these combinations of mods. While I did notice the ram usage, I didn't experience the massive amount of time it took to start the server that you mentioned (~1h, 1h30). It took me 3-10 minutes for the world I loaded up.

If you could somehow prevent all the dimensions from loading when starting the game, then it probably wouldn't take nearly as much ram. I'm not really sure why this combination of mods takes so much ram though.