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System Configuration—DisksAdding More Swap SpaceThere are times when your system runs out of swap space, and you need to addmore swap space for the system to run smoothly. You will have three options asshown in the following list:• Adding a new hard disk.• Creating a swap file on an existing hard disk and partition.• Swapping over network (NFS).Adding swap on a new physical hard disk will give better I/O performance, butit requires you to take the server offline for adding new hardware. Once you haveinstalled a new hard disk, you should launch FreeBSD's disklabel editor and createappropriate partitions on the newly installed hard disk.To invoke the sysinstall's disklabel editor from the command line usesysinstall diskLabelEditor command.If, for any reason, you cannot add new hardware to your server, you can still usethe existing file system to create a swap file with the desired size and add it as swapspace. First of all, you should check to see where you have enough space to create theswap file as shown as follows:# df –hFilesystem Size Used Avail Capacity Mounted on/dev/ad0s1a 27G 9.0G 16G 37% /devfs 1.0K 1.0K 0B 100% /devprocfs 4.0K 4.0K 0B 100% /proc/dev/md0 496M 1.6M 454M 0% /tmpThen create a swap file where you have enough space using the followingcommand line:# dd if=/dev/zero of=/swap0 bs=1024k count=256256+0 records in256+0 records out268435456 bytes transferred in 8.192257 secs (32766972 bytes/sec)[ 10 ]