As I mentioned earlier in the thread, it's my suspicion both Mavericks and Yosemite optimize memory usage based on a use-case of a user only opening a few applications.
I use a wide variety of apps, and have opened more than usual recently to upgrade apps to Yosemite. When it hits 99% Memory Used it vary easily starts using Swap because the OS refuses to get rid of the memory that it still has assigned to closed apps, and also doesn't get rid of Swap when free RAM becomes available.
Here's my current vm_stat:
For many people, the memory management may result in no swapping. But for my use-case, I've always had to deal with swap issues when none should exist.
I use a wide variety of apps, and have opened more than usual recently to upgrade apps to Yosemite. When it hits 99% Memory Used it vary easily starts using Swap because the OS refuses to get rid of the memory that it still has assigned to closed apps, and also doesn't get rid of Swap when free RAM becomes available.
Here's my current vm_stat:
For many people, the memory management may result in no swapping. But for my use-case, I've always had to deal with swap issues when none should exist.