内存

使用free -m, available包含了free, available里面除了free的还有磁盘的页缓存。

The "available" memory accounts for that. It sums up all memory that is unused or can be freed immediately.

              total        used        free      shared  buff/cache   available
Mem:          15903        3288        7868         878        4747       11442
Swap:             0           0           0