howto calculate free memory from top

Dan Nelson dnelson at
Tue Sep 9 15:10:11 PDT 2003

In the last episode (Sep 09), Jesse Guardiani said:
> >> So they _are_ available for use then? And thus are relatively free,
> >> correct?
> > 
> > All memory except for Wired is "free", to varying degrees.
> OK. Just out of curiosity, what would you say about my example then:
> ------
> Mem: 72M Active, 668M Inact, 165M Wired, 29M Cache, 112M Buf, 70M Free
> Swap: 2048M Total, 5448K Used, 2043M Free
> ------
> Based on that FAQ, I would say that I've got about 80M of immediately
> available memory, and if the system gets pushed really hard, I can
> probably spare another 600M or so with relatively minimal swap usage.
> Is that accurate?

Sounds about right.

	Dan Nelson
	dnelson at

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