Date: Tue, 09 Sep 2003 13:06:41 -0400 From: Jesse Guardiani <jesse@wingnet.net> To: freebsd-questions@freebsd.org Subject: Re: howto calculate free memory from top Message-ID: <bjl1b1$4qu$1@sea.gmane.org> References: <bjkheq$cg8$1@sea.gmane.org> <33CC6198-E2E7-11D7-A4CA-003065ABFD92@mac.com>
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Charles Swiger wrote: > > On Tuesday, September 9, 2003, at 08:35 AM, Jesse Guardiani wrote: >> How do I calculate the amount of free memory my system >> has at any given point in time? > > What do you mean by "free memory"? Memory that can be used by other programs before the vm starts using swap. > >> My top usually looks like this: >> >> Mem: 72M Active, 668M Inact, 165M Wired, 29M Cache, 112M Buf, 70M Free >> Swap: 2048M Total, 5448K Used, 2043M Free >> >> I understand the "70M Free" part, but should I add "668M Inact" to >> that? Or is it more complicated? > > It's more complicated. The "inactive" memory refers to pages that have > been used (but not recently), and thus are candidates for being > replaced by more active pages, if the system has enough activity to > want such pages for other tasks. So they _are_ available for use then? And thus are relatively free, correct? -- Jesse Guardiani, Systems Administrator WingNET Internet Services, P.O. Box 2605 // Cleveland, TN 37320-2605 423-559-LINK (v) 423-559-5145 (f) http://www.wingnet.net
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