By default, Red Hat Enterprise Linux 6 uses all available space during installation. If this is the case with your system, then you must first add a new physical volume to the volume group used by the swap space. For instructions on how to do so, refer to Section 13.2.2, “Adding Unallocated Volumes to a Volume Group”.
After adding additional storage to the swap space's volume group, it is now possible to extend it. To do so, perform the following procedure (assuming /dev/VolGroup00/LogVol01 is the volume you want to extend by 2 GB):
Procedure 14.1. Extending Swap on an LVM2 Logical Volume
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Disable swapping for the associated logical volume:
# swapoff -v /dev/VolGroup00/LogVol01
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Resize the LVM2 logical volume by 2 GB:
# lvresize /dev/VolGroup00/LogVol01 -L +2G
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Format the new swap space:
# mkswap /dev/VolGroup00/LogVol01
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Enable the extended logical volume:
# swapon -v /dev/VolGroup00/LogVol01
To test if the logical volume was successfully extended, use cat /proc/swaps or free to inspect the swap space.
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