[root@cdh- sbin]# free -g
total used free shared buff/cache available
Mem:
Swap:
[root@cdh- sbin]# cat /proc/vmstat | egrep "dirty|writeback"
nr_dirty
nr_writeback
nr_writeback_temp
nr_dirty_threshold
nr_dirty_background_threshold
[root@cdh- sbin]# sysctl -w vm.swappiness=
vm.swappiness =
[root@cdh- sbin]# echo "vm.swappiness = 0">> /etc/sysctl.conf
[root@cdh- sbin]# swapoff -a
[root@cdh- sbin]# free -g
total used free shared buff/cache available
Mem:
Swap:
[root@cdh- sbin]# sysctl -p
vm.swappiness =
vm.swappiness =
[root@cdh- sbin]# free -g
total used free shared buff/cache available
Mem:
Swap:
第一部分Mem行解释:
total: 内存总数;
used: 已经使用的内存数;
free: 空闲的内存数;
Buffers/cached: 磁盘缓存的大小。
关系: total = used + free +Buffers/cached