I recently upgraded my mid-2011 15" MacBook Pro to OSX 10.9 Mavericks. Since then, my computer's RAM usage spikes to the point of making my computer unusable. Specifically, anywhere between a minute and 2 hours after booting up, the process
kernel_task will use between 4 and 5 GB of RAM (I have 8 GB installed) and
mds_store will use around 2 GB between them. At that point all of my apps become unresponsive.
If I don't restart my computer within about five minutes of this happening, OSX will ask me to quit all of my apps. If I don't do that the computer becomes totally unresponsive (even to restart requests) and I have to perform a hard shutdown. If I do, the same thing happens but it takes a couple minutes longer. I talked to an Apple representative and he said to flash my PRAM and reset the SMC, which I did, but nothing happened.
Aside from that he said to send my device in, which I can't do at the moment. Any idea what's going on?