I originally had only ~400mb dedicated. I now have about 1.5 gigs dedicated. It only ever seems to use about 1 gig maximum, though, even on higher settings, so I lowered it. I still experience the issue, although it is slightly less prevalent now. I have heard recently that it has something to do with being near large amounts of Redstone, which I am. I am making a build mostly lit by Redstone Lanterns.
I originally had only ~400mb dedicated. I now have about 1.5 gigs dedicated. It only ever seems to use about 1 gig maximum, though, even on higher settings, so I lowered it. I still experience the issue, although it is slightly less prevalent now. I have heard recently that it has something to do with being near large amounts of Redstone, which I am. I am making a build mostly lit by Redstone Lanterns.