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. What is my 'free' saying? Why is so much
memory free? IIUC, the 'free' column in the first line should
generally be close to zero if all the memory is available and not
reserved, and I'm pretty sure that with the tmpfs enabled, it never
drops below about a GB or so.
The second line, OTOH, does seem to show that only ~620MB are actually
in use, and the rest in free.
Celejar
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