I saw memory usage by using System Monitor it showed me 778Mb/2012Mb. Then I checked it using free -m on terminal. I saw this
total used free shared buffers cached
Mem: 2012 1922 89 0 130 1013
-/+ buffers/cache: 778 1234
Swap: 2047 0 2047
How come this vast difference. Looks like system monitor is showing -/+ bufferes/cache reading as total used memory. But what is this exactly? If used memory of 1922Mb was true, then my system would have become horrible slow. Will anyone explain this? I use fedora 13