total        used        free      shared  buff/cache   available
Mem:          15005        3331       10627         274        1046       11150
Swap:             0           0           0
              total        used        free      shared  buff/cache   available
Mem:          15005        3376       10732         274         897       11108
Swap:             0           0           0
              total        used        free      shared  buff/cache   available
Mem:          15005        3266       10693         274        1046       11216
Swap:             0           0           0
              total        used        free      shared  buff/cache   available
Mem:          15005        3339       10743         274         923       11145
Swap:             0           0           0