$ free --seconds 10 --count 3 | tail --lines 4
total used free shared buffers cached
Mem: 1024332 880356 143976 4552 195172 201104
-/+ buffers/cache: 484080 540252
Swap: 0 0 0
$ vmstat 10 3
procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
r b swpd free buff cache si so bi bo in cs us sy id wa st
3 0 0 112604 212448 229232 0 0 96 81 75 99 4 1 93 1 1
1 0 0 107920 212516 229728 0 0 5 592 667 820 36 8 47 1 8
1 0 0 109440 212592 230292 0 0 6 771 698 892 40 7 48 0 4
$ free --seconds 10 --count 3 & vmstat 10 3
[1] 24848
procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
r b swpd free buff cache si so bi bo in cs us sy id wa st
3 0 0 88796 216792 247424 0 0 94 84 79 104 4 1 92 1 1
total used free shared buffers cached
Mem: 1024332 935660 88672 4552 216792 247424
-/+ buffers/cache: 471444 552888
Swap: 0 0 0
1 0 0 82572 216844 247836 0 0 6 525 686 900 38 8 47 1 6
total used free shared buffers cached
Mem: 1024332 942380 81952 4552 216844 247836
-/+ buffers/cache: 477700 546632
Swap: 0 0 0
1 0 0 77672 216944 248028 0 0 10 554 703 916 39 8 48 1 4
total used free shared buffers cached
Mem: 1024332 940540 83792 4552 216944 248028
-/+ buffers/cache: 475568 548764
Swap: 0 0 0
[1]+ Done free --seconds 10 --count 3
| Mem |
total |
free |
1024332 |
940540 + 83792 = 475568 + 548764 |
| used |
free |
940540 |
|
| free |
free |
83792 |
|
| buffers |
free,vmstat |
216944 |
|
| cached |
free,vmstat |
248028 |
|
| -/+ buffers/cache |
used |
free |
475568 |
940540 - 216944 - 248028 |
| free |
free |
548764 |
83792 + 216944 + 248028 |