increasing swap space on peebles

 Problem Description : 

increase swap space on peebles

 Resolution : 

I needed to increase swap to 16 g. i used the following steps from the this link. http://www.thegeekstuff.com/2010/08/how-to-add-swap-space/

Method 2: Use a File for Additional Swap Space

If you don’t have any additional disks, you can create a file somewhere on your filesystem, and use that file for swap space.

The following dd command example creates a swap file with the name “myswapfile” under /root directory with a size of 1024MB (1GB).

# dd if=/dev/zero of=/root/myswapfile bs=1M count=1024

1024+0 records in

1024+0 records out

# ls -l /root/myswapfile

-rw-r--r-- 1 root root 1073741824 Aug 14 23:47 /root/myswapfile

Change the permission of the swap file so that only root can access it.

# chmod 600 /root/myswapfile

Make this file as a swap file using mkswap command.

# mkswap /root/myswapfile

Setting up swapspace version 1, size = 1073737 kB

Enable the newly created swapfile.

# swapon /root/myswapfile

To make this swap file available as a swap area even after the reboot, add the following line to the /etc/fstab file.

# cat /etc/fstab

/root/myswapfile swap swap defaults 0 0

Verify whether the newly created swap area is available for your use.

# swapon -s

Filename Type Size Used Priority

/dev/sda2 partition 4192956 0 -1

/root/myswapfile file 1048568 0 -2

# free -k

 total used free shared buffers cached

Mem: 3082356 3022364 59992 0 52056 2646472

-/+ buffers/cache: 323836 2758520

Swap: 5241524 0 5241524

Note: In the output of swapon -s command, the Type column will say “file” if the swap space is created from a swap file.

If you don’t want to reboot to verify whether the system takes all the swap space mentioned in the /etc/fstab, you can do the following, which will disable and enable all the swap partition mentioned in the /etc/fstab

# swapoff -a

# swapon -a

 Revision Date : 10/18/2013