alt Hacker News> If you count all of those as free, that’s not accurate.
Why not? It depends on what you’re measuring. Physical memory? They count as free. Virtual memory? They count as used.
The ambiguities only arise when we stop making that distinction very clear.
> It depends on what you’re measuring.
What I want to know is do I have enough physical memory for what I'm running.
Sure, I can drop disk backed pages and recreate them as needed, but when it happens too often, there goes performance.