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# Tested on RHEL 5, 6 & 7
# Adding a file to swap space is not a common operation so we will focus on adding a LV # Check current swap volume(s) and its size root@<server>:/#> cat /etc/fstab | grep swap /dev/rvg/swaplv swap swap defaults 0 0 root@<server>:/#> lvdisplay /dev/rvg/swaplv --- Logical volume --- LV Name /dev/rvg/swaplv VG Name rvg LV UUID m0EThc-4Epd-Ecj3-lvPK-BfU0-D98H-1pgyRY LV Write Access read/write LV Status available # open 1 LV Size 13.69 GB Current LE 438 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:5 root@<server>:/#> free -m total used free shared buffers cached Mem: 11239 4556 6682 0 422 3697 -/+ buffers/cache: 436 10802 Swap: 14015 0 14015 <---- root@<server>:/#> cat /proc/swaps Filename Type Size Used Priority /dev/mapper/rvg-swaplv partition 14352376 0 -3 # Create a new Logical Volume, preferably on system VG, that will be dedicated to swap space # We will extend swap by adding a 1 GB Logical Volume # Verify that there is enough space on VG root@<server>:/#> vgdisplay /dev/rvg --- Volume group --- VG Name rvg System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 23 VG Access read/write VG Status resizable MAX LV 0 Cur LV 6 Open LV 6 Max PV 0 Cur PV 1 Act PV 1 VG Size 136.50 GB PE Size 32.00 MB Total PE 4368 Alloc PE / Size 1718 / 53.69 GB Free PE / Size 2650 / 82.81 GB <---- VG UUID 2TkcmU-Uzys-Znql-aXqx-pr2D-O8dk-oWsOlL # Create new LV root@<server>:/#> lvcreate -L 1GB -n newswaplv rvg Logical volume "newswaplv" created # Check LV root@<server>:/#> lvdisplay /dev/rvg/newswaplv --- Logical volume --- LV Name /dev/rvg/newswaplv VG Name rvg LV UUID gf2IqR-kRMj-vMnJ-VCH3-N0gh-UxoG-AWX6Xu LV Write Access read/write LV Status available # open 0 LV Size 1.00 GB Current LE 32 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:6 # Set up the new swap area root@<server>:/#> mkswap /dev/rvg/newswaplv Setting up swapspace version 1, size = 1073737 kB # Enable swapping on new LV root@<server>:/#> swapon /dev/rvg/newswaplv # Check final size and partitions being used by swap root@<server>:/#> free total used free shared buffers cached Mem: 11508864 4664996 6843868 0 432464 3786168 -/+ buffers/cache: 446364 11062500 Swap: 15400944 0 15400944 <---- root@<server>:/#> cat /proc/swaps Filename Type Size Used Priority /dev/mapper/rvg-swaplv partition 14352376 0 -5 /dev/mapper/rvg-newswaplv partition 1048568 0 -6 <---- # Add following line to /etc/fstab for the LV to be automatically mounted as swap # during system startup /dev/rvg/newswaplv swap swap defaults 0 0 |