Reducing Swap on an LVM2 Logical Volume

To reduce an LVM2 swap logical volume (assuming dev/VolGroup00/LogVol01
is the volume you want to extend):

1. Disable swapping for the associated logical volume:
  • # swapoff -v /dev/VolGroup00/LogVol01
2. Reduce the LVM2 logical volume by 512 MB:
  • # lvm lvreduce /dev/VolGroup00/LogVol01 -L -512M
3. Format the new swap space:
  • # mkswap /dev/VolGroup00/LogVol01
4. Enable the extended logical volume:
  • # swapon –va
5. Test that the logical volume has been reduced properly:
  • # cat /proc/swaps # free

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