Board Thread:Bug Reports/@comment-30302646-20161023173622/@comment-25330335-20161023193522

A few things:

Spoilers are a wonderful thing. Use them.

Just because you have 8GB of RAM on your computer doesn't mean that Minecraft can automatically use all of that. Some of it has to be used for your operating system or other programs. So your computer has to allocate memory for programs to use. It only uses the RAM when MC is running, since RAM is a physical card in your computer. You'll still have 8GB on your computer after allocating 2 or more gigs to MC.

Did I mention that spoilers are amazing? Let me reiterate: Spoilers are amazing.