LVM: Reduce SWAP size by removing a Logical Volume
Article Number: 175 | Rating: Unrated | Last Updated: Sat, Jun 2, 2018 10:32 PM
LVM: Reduce SWAP size by removing a Logical Volume
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# Tested on RHEL 5, 6 & 7
# Check current swap volume(s) and its size root@<server>:/#> cat /etc/fstab | grep swap /dev/rvg/swaplv swap swap defaults 0 0 /dev/rvg/newswaplv swap swap defaults 0 0 root@<server>:/#> free -m total used free shared buffers cached Mem: 11239 392 10846 0 102 120 -/+ buffers/cache: 169 11069 Swap: 15039 0 15039 <---- root@<server>:/#> cat /proc/swaps Filename Type Size Used Priority /dev/mapper/rvg-swaplv partition 14352376 0 -1 /dev/mapper/rvg-newswaplv partition 1048568 0 -2 # We will reduce swap space by removing /dev/mapper/rvg-newswaplv Logical Volume # Disable swapping on selected LV root@<server>:/#> swapoff /dev/rvg/newswaplv # Check new size and partitions being used by swap root@<server>:/#> free total used free shared buffers cached Mem: 11508864 401412 11107452 0 104992 123432 -/+ buffers/cache: 172988 11335876 Swap: 14352376 0 14352376 <---- root@<server>:/#> cat /proc/swaps Filename Type Size Used Priority /dev/mapper/rvg-swaplv partition 14352376 0 -1 # Remove following line from /etc/fstab to prevent system from mounting removed LV /dev/rvg/newswaplv swap swap defaults 0 0 # If necessary, completely remove Logical Volume # root@<server>:/#> lvremove /dev/rvg/newswaplv # Do you really want to remove active logical volume newswaplv? [y/n]: y # Logical volume "newswaplv" successfully removed |
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