Adding swap

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/files0/swapfile swap swap defaults 0 0
/files0/swapfile swap swap defaults 0 0
== Links ==
== Links ==
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* [ http://www.redhat.com/docs/manuals/enterprise/RHEL-3-Manual/sysadmin-guide/s1-swap-adding.html Adding Swap Space ]
+
* [http://www.redhat.com/docs/manuals/enterprise/RHEL-3-Manual/sysadmin-guide/s1-swap-adding.html Adding Swap Space]

Revision as of 20:50, 27 December 2007

Overview

Swap needed to be increased to 8GB from 4GB on a RHEL 5 system. All hard drive space was already allocated, so I had to create a swap file (/files0/swapfile in this example) instead of a swap partition.

$ free
             total       used       free     shared    buffers     cached
Mem:       8177384    4098900    4078484          0     133220    3671700
-/+ buffers/cache:     293980    7883404
Swap:      4192912          0    4192912
  • Create the 4GB swap file.
# dd if=/dev/zero of=/files0/swapfile bs=1024 count=4194304
4194304+0 records in
4194304+0 records out
4294967296 bytes (4.3 GB) copied, 36.1759 seconds, 119 MB/s
  • Setup the swap file.
# mkswap /files0/swapfile
Setting up swapspace version 1, size = 4294963 kB
  • Enable the swapfile immediately.
# swapon /files0/swap file
  • Enable the swap file after reboot.

Add the following to /etc/fstab:

/files0/swapfile        swap                    swap    defaults        0 0

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