linux内存管理命令
linux内存管理命令
linux内存管理命令
vmstat -s
与free -m 是比较好的观测内存的命令
www.2cto.com
刚进入运行的系统
-bash-3.2$ vmstat -s
30897940 total memory
184408 used memory
78848 active memory
67432 inactive memory
30713532 free memory
6356 buffer memory
105176 swap cache
4192956 total swap
0 used swap
4192956 free swap
369 non-nice user cpu ticks
0 nice user cpu ticks
537 system cpu ticks
120270 idle cpu ticks
1523 IO-wait cpu ticks
4 IRQ cpu ticks
50 softirq cpu ticks
0 stolen cpu ticks
112896 pages paged in
9724 pages paged out
0 pages swapped in
0 pages swapped out
160886 interrupts
71964 CPU context switches
1350373112 boot time
2821 forks
[root@localhost ~]# free -m
total used free shared buffers cached
Mem: 30173 179 29994 0 6 102
-/+ buffers/cache: 70 30103
Swap: 4094 0 4094
==========
www.2cto.com
运行很长时间,内存cach了很多
[root@localhost ssh]# vmstat -a 2
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------
r b swpd free inact active si so bi bo in cs us sy id wa st
0 0 0 23590020 5347780 1614948 0 0 0 1 1 0 0 0 100 0 0
0 0 0 23590020 5347772 1615016 0 0 0 4 1006 306 0 0 100 0 0
0 0 0 23590020 5347772 1615012 0 0 0 0 1002 301 0 0 100 0 0
0 0 0 23589880 5347772 1615012 0 0 0 24 1017 384 0 0 100 0 0
www.2cto.com
root@localhost ssh]# vmstat -s
30897940 total memory
7302736 used memory
1610636 active memory
5346844 inactive memory
23595204 free memory
274844 buffer memory
6102092 swap cache
4192956 total swap
0 used swap
4192956 free swap
558515 non-nice user cpu ticks
1193 nice user cpu ticks
585088 system cpu ticks
2967723549 idle cpu ticks
210472 IO-wait cpu ticks
4406 IRQ cpu ticks
301885 softirq cpu ticks
0 stolen cpu ticks
543204 pages paged in
41063536 pages paged out
0 pages swapped in
0 pages swapped out
3722943494 interrupts
393601166 CPU context switches
1346660283 boot time
8934193 forks
www.2cto.com
[root@localhost ssh]# vmstat
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------
r b swpd free buff cache si so bi bo in cs us sy id wa st
0 0 0 23595204 274848 6102060 0 0 0 1 1 0 0 0 100 0 0
[root@localhost ssh]# free -m
total used free shared buffers cached
Mem: 30173 7131 23042 0 268 5958
-/+ buffers/cache: 904 29269
Swap: 4094 0 4094
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