Free Software Server Environment: Swap Space

Swap Space

Have you ever wanted to change the amount of swap space on your VM ? Here's how to !

disable existing swap

# free -k
# swapoff -a
# free -k

get some more disk space

Either repartition an existing disk or add a new disk to your GNU/Linux machine or VM
and use fdisk to create/repartition a swap partition (type 82) for your swap space

# fdisk /dev/mydisk

verify

# fdisk -l /dev/mydisk

Disk /dev/mydisk: 2147 MB, 2147483648 bytes
255 heads, 63 sectors/track, 261 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/mypart1            1         261   2096451   82  Linux swap / Solaris

make a swap partition and use a speciail swap disk label !

# mkswap -L myswap /dev/mypart1

add to fstab

Add swap partition to fstab using your special swap disk label !

# vi /etc/fstab
LABEL=myswap         swap                    swap    defaults        0 0

reenable swap

# swapon -a
# free -k

reboot (optional)

Finally reboot to check new swap area gets picked up on reboot !

# reboot

and login and check new swap space is available

# free -k

REFERRERS
SystemServices