Cached blocks can be both "In use" and "Available" at the same time, for example! There's also things like the standby page list (which also contains cached disk objects!) and recent evicts, which exist in a limbo zone between in use and not in use. It's also a virtual memory system, meaning there are lots of types of memory, some of them should be counted as "used" and some of them shouldn't be. Why waste RAM? It's one of the most precious commodities a PC has. You see, memory not used is memory wasted. There's either water in the bucket or not, so memory is either in use or not, right? In this model, a Windows system would almost always be 95-100% full. You seem to be thinking of a fairly naive "bucket model" of memory. You're inadvertently looking to cause yourself a problem, though. ![]() I'm guessing the answer is "no" in all three cases. Is the system slow? Does it crash? Do applications not run?
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