Reducing Swap on an LVM2 Logical Volume

On September 20, 2009, in lvm2, reduce swap, by Dipin Krishna

To reduce an LVM2 swap logical volume (assuming /dev/VolGroup00/LogVol01 is the volume you want to extend): Replace /dev/VolGroup00/LogVol01 with your HD partition.

  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 or # free
 

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