Idle RAM Usage Question

[abowlby]

I recently upgraded my 2013 13" rMBP to a 15" rMBP and noticed something rather interesting. On my 13" Pro, the RAM sat idle at about 2GB of use. On my 15" the RAM sits at about 4GB. Any thoughts on this?

 

[MagicBoy]

Nothing to worry about, it's just OS X making most efficient use of the 16GB RAM in the 15".

 

[abowlby]

Thanks. I like how Activity Monitor shows the compression information of the RAM. Come to think of it, it's much lower than it was on the 13" Pro.