On Tue, 25 Jan 2011 21:35:41 +0100 Sven Joachim <svenj...@gmx.de> wrote:
> On 2011-01-25 21:03 +0100, Celejar wrote: > > > On Tue, 25 Jan 2011 08:49:57 +0100 > > Sven Joachim <svenj...@gmx.de> wrote: > > > >> On 2011-01-25 02:50 +0100, Celejar wrote: > >> > >> > On Mon, 24 Jan 2011 17:41:07 -0600 > >> > "Boyd Stephen Smith Jr." <b...@iguanasuicide.net> wrote: > >> > > >> > ... > >> > > >> >> tmpfs doesn't reserve much (if any) memory. So, unless it is being > >> >> actively > >> >> used by files in the tmpfs, it can be used by other applications. > >> > > >> > I'm somewhat confused about this. My system has 2GB of RAM, and I have: > >> > > >> > $ uptime > >> > 20:46:09 up 5 days, 5:30, 9 users, load average: 0.06, 0.09, 0.25 > >> > > >> > $ free > >> > total used free shared buffers cached > >> > Mem: 2065172 1047312 1017860 0 66064 357512 > >> > -/+ buffers/cache: 623736 1441436 > >> > Swap: 1949688 102364 1847324 > >> > > >> > $ df | grep tmp > >> > tmpfs 1032584 16 1032568 1% /lib/init/rw > >> > tmpfs 1032584 0 1032584 0% /dev/shm > >> > none 1032584 2440 1030144 1% /tmp > >> > > >> > So my /tmp is using 1GB. > >> > >> No, because more than 99% of the space on /tmp are free. > > > > But if that memory isn't actually reserved for the tmpfs filesystem, and > > is actually available for other uses (until /tmp fills up), than > > shouldn't that memory either be reported as 'free' by free, or used for > > disk caching, etc., and therefore be reported as 'used'? > > I'm not sure I can parse this correctly. If you're referring to half of > your memory being free, that's certainly a bit unusual, but it probably Yes. > can be explained. Maybe you hibernated your system in the five days > it's been up, or you were watching a DVD and ejected the media. Or you > have just terminated a process that used a lot of RAM. You're right; I see now that 'free' reports only 317376 free. This is a laptop, and I do hibernate it a couple of times a day, so I suppose that the cache(s) are thrown away to use the RAM for hibernation (and to avoid pointlessly saving cached disk data in RAM back to disk), and then when the system is restored, the RAM becomes free again until it's once again used for cache or application storage? Celejar -- foffl.sourceforge.net - Feeds OFFLine, an offline RSS/Atom aggregator mailmin.sourceforge.net - remote access via secure (OpenPGP) email ssuds.sourceforge.net - A Simple Sudoku Solver and Generator -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20110125154826.481af9a7.cele...@gmail.com
