13.6. Extending swap on an LVM2 logical volume


You can extend swap space on an existing LVM2 logical volume. Assuming /dev/VolGroup00/LogVol02 is the volume you want to extend by 2 GB.

Prerequisites

  • You have enough disk space.

Procedure

  1. Disable swapping for the associated logical volume:

    # swapoff -v /dev/VolGroup00/LogVol02
  2. Resize the LVM2 logical volume by 2 GB:

    # lvresize -L +2G /dev/VolGroup00/LogVol02
  3. Format the new swap space:

    # mkswap /dev/VolGroup00/LogVol02
  4. Enable the extended logical volume:

    # swapon -v /dev/VolGroup00/LogVol02

Verification

  • To test if the swap logical volume was successfully extended and activated, inspect active swap space:

    # cat /proc/swaps
    Filename               Type        Size         Used        Priority
    /dev/dm-6         partition     6291452            0              -2
    # free -h
                   total        used        free      shared  buff/cache   available
    Mem:            30Gi       1.2Gi        28Gi        12Mi       994Mi        28Gi
    Swap:          6.0Gi          0B       6.0Gi
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