Is it possible to give unity more ram?

Can you give more ram to unity, ive got 16 and unity lags even though my system is only is using 1/3 of the usage while I watch a video. Or does unity take as much as it wants and there for just lags because it hates me. Ive looked all around for this but no one asks. also my game some how has 2 million vert’s just by looking at a little grass and some terrain, is that normal?

Thanks

Two million verts is a LOT for a whole scene, let alone just grass and terrain. Unity should be able to use as much ram as it needs (assuming it’s the 64-bit version). Your bottleneck is probably your graphics card.