[CentOS] Memory reporting...

John Doe

jdmls at yahoo.com
Tue Jul 7 08:49:40 UTC 2009


From: Peter Kjellstrom <cap at nsc.liu.se>
> On Monday 06 July 2009, John Doe wrote:
> > When I do a free, I get:
> >              total       used       free     shared    buffers     cached
> > Mem:      18482800   18030668     452132          0     683068    9426792
> > -/+ buffers/cache:    7920808   10561992
> > But, when I do a ps, mysql is the only process that takes noticable memory;
> > and it is far from 7.9GBs...
> > USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
> > mysql    28346 36.0 15.6 3241196 2884692 ?     Sl   Jul04 981:19  \_
> > Once you removed the buffers and the cached memory from the total used
> > memory... what is left? Looks like I have "something" (that is not
> > buffers/cached) that takes more than 4GB... Could it be disk cache or is it
> > included in the cached value?
> 
> /proc/meminfo may give you a more detailed summary.

Sadly, not much more information in /proc/meminfo...
Same values as in free, since free reads it.
Basicaly, 7.9GB are apparently used, but the sum of the memory used by all the processes is around 3.5GB...

JD


      




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