On gui I see memory usage is %70 but when I test it with "free -m" I get lower value as free memory;
total used free shared buffers cached
Mem: 16013 15821 191 323 696 4546
-/+ buffers/cache: 10578 5434
Swap: 1022 317 705
total used free shared buffers cached
Mem: 16013 15821 191 323 696 4546
-/+ buffers/cache: 10578 5434
Swap: 1022 317 705