虚拟内存的释放一般都是伴随着关闭应用程式来说的
可以通过命令刷新swap还原到初始状态:
swapoff -a
swapon -a
例如:
[root@wjlcn1026 vm]# free -m
total used free shared buffers cached
Mem: 1744 913 830 0 0 491
-/+ buffers/cache: 422 1321
Swap: 2015 1097 918
[root@wjlcn1026 vm]# swapoff -a
[root@wjlcn1026 vm]# free -m
total used free shared buffers cached
Mem: 1744 1109 634 0 5 694
-/+ buffers/cache: 410 1333
Swap: 0 0 0
[root@wjlcn1026 vm]# swapon -a
[root@wjlcn1026 vm]# free -m
total used free shared buffers cached
Mem: 1744 1116 627 0 5 694
-/+ buffers/cache: 417 1326
Swap: 2015 0 2015