extend swap space
I have a RHEL box with 16G Ram and 8G swap. I want to extend the swap space to 16G (+8G).
There is not enough space for extending swap lvm so I would like to reallocate some space from /home to swap.
Please kindly advise the steps by steps for this reallocation.
Version : RHEL 7.2 workstation
$ df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/rhel-root 52403200 8841648 43561552 17% /
devtmpfs 8063804 0 8063804 0% /dev
tmpfs 8080448 24 8080424 1% /dev/shm
tmpfs 8080448 429828 7650620 6% /run
tmpfs 8080448 0 8080448 0% /sys/fs/cgroup
/dev/nvme0n1p2 508588 212216 296372 42% /boot
/dev/nvme0n1p1 204580 9964 194616 5% /boot/efi
/dev/mapper/rhel-home 188561452 63225364 125336088 34% /home
tmpfs 1616092 136 1615956 1% /run/user/1000
/dev/sda1 3947824 3947824 0 100% /run/media/xxxx/RHEL-7.2 Server.x86_64
$ sudo lvdisplay
[sudo] password for xxxx:
--- Logical volume ---
LV Path /dev/rhel/swap
LV Name swap
VG Name rhel
LV UUID nztdi1-tX67-eH1e-5W9K-r6LZ-yJYX-MM5dhm
LV Write Access read/write
LV Creation host, time localhost, 2018-04-07 19:19:21 +0800
LV Status available
# open 2
LV Size 7.81 GiB
Current LE 2000
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
--- Logical volume ---
LV Path /dev/rhel/home
LV Name home
VG Name rhel
LV UUID YS62cD-arv7-OJEo-D60g-eavo-Kklu-K6WPzz
LV Write Access read/write
LV Creation host, time localhost, 2018-04-07 19:19:21 +0800
LV Status available
# open 1
LV Size 179.91 GiB
Current LE 46058
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:2
--- Logical volume ---
LV Path /dev/rhel/root
LV Name root
VG Name rhel
LV UUID fAyjNt-XULs-SS61-7QrX-JLO8-aXZF-9eHGmx
LV Write Access read/write
LV Creation host, time localhost, 2018-04-07 19:19:22 +0800
LV Status available
# open 1
LV Size 50.00 GiB
Current LE 12800
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
$ sudo vgs
VG #PV #LV #SN Attr VSize VFree
rhel 1 3 0 wz--n- <237.79g 64.00m