Universal Media Server | Forum

It would be nice if it could automatically reduce the amount of RAM its using if there's nothing being streamed after streaming a video, etc.

Well this is impossible. The only way to "give back" memory to the operating system is to kill/restart the program. So if UMS allocated 700M of memory that figure will never go down (until the program dies). However UMS will not allocate any more memory (if it doesn't need it of course)