Linux Troubleshooting Make Easy.

Linux Learning & Troubleshooting Make Easy.

Increase SWAP space Using a Logical Volume


To Increase SWAP space in your Linux Server.

Creating A Logical Volume For SWAP:

First check the Volume Group for required Space for SWAP:
#  vgdisplay

Create a new logical Volume for SWAP:
#  lvcreate -L +200M -n /dev/vg0/lv_swap




Note: +200M is the required SWAP size In MB.

Format the new SWAP logical volume with ext3 file system:
#  mke2fs -j /dev/vg0/lv_swap

create SWAP on the new SWAP logical volume:
#  mkswap /dev/vg0/lv_swap

For Clarification, check Current SWAP size:
#  free -m

Update /etc/fstab for new SWAP logical volume:
 /dev/vg0/lv_swap          swap                    swap    defaults        0 0

Now Enable SWAP on new SWAP logical volume:
#  swapon /dev/vg0/lv_swap   

Now verify increased SWAP size:
# free -m



########################################################################


To Delete the SWAP logical volume:

First need to Stop the SWAP logical volume Usage:
#  swapoff /dev/vg0/lv_swap

Remove the SWAP logical volume entry from /etc/fstab :
/dev/vg0/lv_swap        swap                    swap    defaults        0 0

Delete the SWAP logical volume:
#  lvremove /dev/vg0/lv_swap



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