top
top - 11:42:49 up 3
days, 17:46, 1 user, load average: 3394.34, 3393.63, 3393.76
Tasks: 5095 total, 4 running, 5091 sleeping, 0 stopped,
0 zombie
%Cpu(s): 1.9 us,
4.8 sy, 0.0 ni, 92.8 id, 0.4 wa,
0.0 hi, 0.1 si, 0.0 st
KiB Mem : 78898592
total, 6672208 free, 71903216 used, 323168 buff/cache
KiB Swap: 0 total, 0 free, 0 used.
6533600 avail Mem
PID USER
PR NI VIRT
RES SHR S %CPU %MEM
TIME+ COMMAND
25327 root
20 0 2971220 443236 16984 S
10.3 0.6 417:43.74 cm
149494 root 20
0 153208 1876
1460 R 5.5 0.0
0:00.17 ps
149501 root 20
0 49592 1732
1324 R 5.2 0.0
0:00.16 ps
Free
linux-37qq:~ # free
total used free shared buffers cached
Mem: 16336924 1563160 14773764 0 1836 1242536
-/+ buffers/cache: 318788 16018136
Swap: 2103292 0
2103292
16018136= 14773764 + 1836 + 1242536
318788= 1563160- 1836 - 1242536
buffers和cached,相当于从内存中拿出来,但不一定完全用完。所以1836表示,取出的buffers但没有用完剩余的,cached同理。
而318788表示实际使用的,所以318788= 1563160- 1836 - 1242536。
16018136表示所有剩余的。