[HEADS-UP] Rawhide: /tmp is now on tmpfs

[Alexey I. Froloff]

On Fri, Jun 01, 2012 at 11:27:01AM -0400, Gerry Reno wrote:
> Wait a minute.  Back in this thread it says that half of RAM is
> allocated to the tmpfs for /tmp.
No-no-no!  Default tmpfs size is half of physical RAM, that's
all.  That doesn't mean that is stays in RAM forever.

$ df -h /tmp
Filesystem      Size  Used Avail Use% Mounted on
tmpfs            24G  1.9M   24G   1% /tmp
$ free -m
             total       used       free     shared    buffers     cached
Mem:         15987      14653       1333          0        328       8402
-/+ buffers/cache:       5922      10065
Swap:        31251         55      31196

$ dd if=/dev/zero of=/tmp/file bs=1M count=10240
10240+0 records in
10240+0 records out
10737418240 bytes (11 GB) copied, 9.02507 s, 1.2 GB/s
$ df -h /tmp
Filesystem      Size  Used Avail Use% Mounted on
tmpfs            24G   11G   14G  42% /tmp
$ free -m
             total       used       free     shared    buffers     cached
Mem:         15987      15892         95          0         13      10105
-/+ buffers/cache:       5773      10213
Swap:        31251       1464      29787

$ dd if=/dev/zero of=/tmp/enother-file bs=1M count=10240 
10240+0 records in
10240+0 records out
10737418240 bytes (11 GB) copied, 57.2924 s, 187 MB/s
$ free -m                                               
             total       used       free     shared    buffers     cached
Mem:         15987      15886        100          0          4      10251
-/+ buffers/cache:       5630      10357
Swap:        31251      10482      20769

$ rm -f /tmp/file /tmp/enother-file 
$ df -h /tmp                                            
Filesystem      Size  Used Avail Use% Mounted on
tmpfs            24G  1.9M   24G   1% /tmp
$ free -m                          
             total       used       free     shared    buffers     cached
Mem:         15987       5718      10268          0          5        146
-/+ buffers/cache:       5566      10420
Swap:        31251        108      31143


-- 
Regards,    --
Sir Raorn.   --- http://thousandsofhate.blogspot.com/
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