root@kg128 ~]# free
total used free shared buff/cache available
Mem: 2865164 975048 1075120 17504 814996 1711896
Swap: 2128892 0 2128892
查看swap分区是否开启
临时关闭swapoff -a
方式1（不好用就使用方法2）：
如果开启vim注释掉swap分区盘符
vim /etc/fstab # # /etc/fstab # Created by anaconda on Tue Dec 28 14:40:17 2021 # # 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. # UUID=f7001d95-9491-4675-9fbc-b647de54f3a2 / xfs defaults 0 0 UUID=b6a0cb32-173e-4e8a-afd9-397176ec5690 /boot xfs defaults 0 0 #UUID=ab784cf2-f29f-4919-8df9-f1c44aad8189 none swap defaults 0 0 #注释掉swap分区 #需要注释/etc/default/grub中/etc/fstab对应的交换设备 vim /etc/default/grub GRUB_TIMEOUT=5 GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)" GRUB_DEFAULT=saved GRUB_DISABLE_SUBMENU=true GRUB_TERMINAL_OUTPUT="console" #GRUB_CMDLINE_LINUX="crashkernel=auto resume=UUID=ab784cf2-f29f-4919-8df9-f1c44aad8189 rhgb quiet" GRUB_DISABLE_RECOVERY="true" GRUB_ENABLE_BLSCFG=true #重载grub配置 grub2-mkconfig -o /boot/grub2/grub.cfg
#reboot重启后生效
[root@kg128 ~]# free
total used free shared buff/cache available
Mem: 3029004 587528 1992920 10864 448556 2272028
Swap: 0 0 0
方法2：通过systemctl 禁止swap交换分区
#查看分区对应的服务 systemctl | grep swap dev-disk-byx2duuid-ab784cf2x2df29fx2d4919x2d8df9x2df1c44aad8189.swap loaded active active /dev/disk/by-uuid/ab784cf2-f29f-4919-8df9-f1c44aad8189 swap.target loaded active active Swap #禁止交换分区 systemctl mask dev-sda3.swap Created symlink /dev-disk-byx2duuid-ab784cf2x2df29fx2d4919x2d8df9x2df1c44aad8189.swap → /dev/null. #重新允许使用systemctl unmask dev-sda3.swap #注释掉 /etc/fstab 下的swap交换设备 # # /etc/fstab # Created by anaconda on Tue Dec 28 14:40:17 2021 # # 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. # UUID=f7001d95-9491-4675-9fbc-b647de54f3a2 / xfs defaults 0 0 UUID=b6a0cb32-173e-4e8a-afd9-397176ec5690 /boot xfs defaults 0 0 #UUID=ab784cf2-f29f-4919-8df9-f1c44aad8189 none swap defaults 0 0 #reboot重启生效
