I have read in depth how Mavericks memory compression works because I find it fascinating, but one things seems curious to me. I've had a rMBP for about 20 days now and it has 16GB of RAM. I noticed that casual use (Safari, Mail, iTunes, Skype) caused memory compression (100-800MB), even with only 5 GB of RAM in use. I didn't really care, Mavericks is smarter then me. However, I also noticed that the system often swapped when I didn't see the need. The attached screenshot is not a drastic case, but one time I was using 6.5 GB of RAM and the system had 455 MB swapped. Why would the system swap memory with an abundance of memory? I thought the point of the advanced memory use was to avoid the swap. ------ I mean, system performance isn't impacted; i'm just curious.