VMware环境下扩容交换分区

1、查看当前虚拟机的交换分区

[root@master ~]# free -m
              total        used        free      shared  buff/cache   available
Mem:           1806         843         105           9         857         793
Swap:             0           0           0

2、创建swap文件

　　a、创建目录

[root@master ~]# mkdir -pv /usr/swap/

　　b、在/usr/swap目录下创建swapfile文件

[root@master ~]# dd if=/dev/zero of=/usr/swap/swapfile bs=1M count=10240

　　c、创建成功输出

[root@master ~]# dd if=/dev/zero of=/usr/swap/swapfile bs=1M count=10240
10240+0 records in
10240+0 records out
10737418240 bytes (11 GB, 10 GiB) copied, 217.143 s, 49.4 MB/s

3、将创建好的swapfile文件作为swap分区文件

[root@master ~]# mkswap /usr/swap/swapfile
mkswap: /usr/swap/swapfile: insecure permissions 0644, 0600 suggested.
Setting up swapspace version 1, size = 10 GiB (10737414144 bytes)
no label, UUID=c7eebc41-800e-4819-9889-fc5247b984d9

4、激活交换分区

[root@master ~]# swapon /usr/swap/swapfile
swapon: /usr/swap/swapfile: insecure permissions 0644, 0600 suggested.
[root@master ~]# free -m
              total        used        free      shared  buff/cache   available
Mem:           1806         949         201           9         655         696
Swap:         10239           1       10238

5、设置开机自动挂载，编辑/etc/fstab文件

[root@master ~]# vim /etc/fstab

#
# /etc/fstab
# Created by anaconda on Tue May  5 09:01:04 2020
#
# Accessible filesystems, by reference, are maintained under '/dev/disk/'.
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info.
#
# After editing this file, run 'systemctl daemon-reload' to update systemd
# units generated from this file.
#
/dev/mapper/cl-root     /                       xfs     defaults        0 0
UUID=4ff0f9ed-b174-480e-9e96-745bfc5e0878 /boot                   ext4    defaults        1 2
/dev/mapper/cl-swap     swap                    swap    defaults        0 0
/usr/swap/swapfile swap swap defaults 0 0