centos 释放swap_centOS7 关闭swap

[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；