1. Find out the name of the swap logical volume using the "lvs" command
[root@hostname ~]# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
lv_download vg_hostname -wi-ao---- 200.00g
lv_holding vg_hostname -wi-ao---- 200.00g
lv_home vg_hostname -wi-ao---- 4.88g
lv_opt vg_hostname -wi-ao---- 29.49g
lv_root vg_hostname -wi-ao---- 5.08g
lv_swap vg_hostname -wi-ao---- 4.00g
lv_tmp vg_hostname -wi-ao---- 4.98g
lv_usr vg_hostname -wi-ao---- 4.98g
lv_var vg_hostname -wi-ao---- 9.96g
2. Find out LV path for swap logical volume
[root@hostname ~]# lvdisplay
--- Logical volume ---
LV Path /dev/vg_hostname/lv_swap
LV Name lv_swap
VG Name vg_hostname
LV UUID IhGUco-xoJp-zQ6S-o8iw-ivdc-fHWE-XS3zI2
LV Write Access read/write
LV Creation host, time hostname.ipx.com, 2015-06-05 10:37:23 +0200
LV Status available
# open 1
LV Size 4.00 GiB
Current LE 1024
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
3. Turn off the swap partition
[root@hostname ~]# swapoff /dev/vg_hostname/lv_swap
4. Resize the swap partition, adding 12GB more space to it
[root@hostname ~]# lvresize -L+12G /dev/vg_hostname/lv_swap
Size of logical volume vg_hostname/lv_swap changed from 4.00 GiB (1024 extents) to 16.00 GiB (4096 extents).
Logical volume lv_swap successfully resized
5. Format the new swap space to make it usable
[root@hostname ~]# mkswap /dev/vg_hostname/lv_swap
mkswap: /dev/vg_hostname/lv_swap: warning: don't erase bootbits sectors
on whole disk. Use -f to force.
Setting up swapspace version 1, size = 16777212 KiB
no label, UUID=b6195773-eba1-4af7-aafc-466867757985
Turn the swap volume back on:
[root@hostname ~]# swapon /dev/vg_hostname/lv_swap
6. Check swap space
[root@hostname ~]# free -tom| grep -i swap
Swap: 16383 0 16383