From: Peter Kjellstrom cap@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