Date: Wed, 20 Jul 2005 11:18:00 +0200 From: Marc Olzheim <marcolz@stack.nl> To: =?iso-8859-1?Q?=D6zkan?= KIRIK <ozkan@mersin.edu.tr> Cc: freebsd-hackers@freebsd.org Subject: Re: Real and Free Memory Message-ID: <20050720091800.GB27390@stack.nl> In-Reply-To: <20050720085658.GA27390@stack.nl> References: <42DE0E91.9000607@mersin.edu.tr> <20050720085658.GA27390@stack.nl>
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--ftEhullJWpWg/VHq Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Jul 20, 2005 at 10:56:58AM +0200, Marc Olzheim wrote: > On Wed, Jul 20, 2005 at 11:42:57AM +0300, zkan KIRIK wrote: > > Hi, > >=20 > > i am trying to measure free memory and real memory. > >=20 > > but values at dmesg.boot and sysctl are diffrent. > >=20 > > # cat /var/run/dmesg.boot | grep real > > real memory =3D 268435456 (256 MB) > >=20 > > # sysctl vm.vmtotal | grep Real > > Real Memory: (Total: 232792K Active 122448K) > >=20 > > As above, values are not equal, > > so that, i cant trust the Free Memory value that sysctl gives. > >=20 > > how can i get right values? >=20 > sysctl hw.physmem Let me be a bit more precise: sysctl vm.stats.vm will show you all the memory info you need in the vm system, as in: pageable memory. It's shown in number of pages (usually 4K: vm.stats.vm.v_page_size). Keep in mind that 'free' memory depends on the way you look at it. Pages that contain still caching synced-on-disk data (inactive pages) can be considered 'free' as well as any 'free' page. See http://www.freebsd.org/doc/en_US.ISO8859-1/books/faq/admin.html#TOP-MEMORY-= STATES Marc --ftEhullJWpWg/VHq Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQFC3hbIezjnobFOgrERApshAJ0U0GbuRYXPZri9HQk8Z/72toXrswCdHM3w JkpEgsueCeuUGPzJ7+T/flw= =Vh9H -----END PGP SIGNATURE----- --ftEhullJWpWg/VHq--
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