Menambah Swap space

1. Be certain that your kernel configuration includes the memory disk driver (md(4)). It is default in GENERIC kernel.

   device   md   # Memory "disks"
   

2. Create a swapfile (/usr/swap0):

   # dd if=/dev/zero of=/usr/swap0 bs=1024k count=64 

3. Set proper permissions on (/usr/swap0):

   # chmod 0600 /usr/swap0 

4. Enable the swap file in /etc/rc.conf:

   swapfile="/usr/swap0"   # Set to name of swapfile if aux swapfile desired.
   

5. Reboot the machine or to enable the swap file immediately, type:

   # mdconfig -a -t vnode -f /usr/swap0 -u 0 && swapon /dev/md0