sysctl - nx.beandog.org

====== sysctl ======

  * [[OpenBSD]]
  * [[NetBSD]]

== Display disk drives ==

<code>
sysctl hw.disknames
</code>

==== Linux ====

Changes to ''sysctl'' go in ''/etc/sysctl.conf''.

Once your changes are made, you can reload from all the system files:

<code>
sysctl --system
</code>

To display all sysctl settings:

<code>sysctl -a</code>

You can set a value directly as well:

<code>
sysctl -w net.ipv4.ip_forward=1
</code>

=== Swappiness ===

  * [[http://www.cloudibee.com/linux-performance-tuning-vm-swappiness/|Linux performance tuning – vm.swappiness]]

In Linux, set the percentage to 10 in ''/etc/sysctl.conf'':

<code>
vm.swappiness = 10
</code>

[[https://en.wikipedia.org/wiki/Swappiness|Wikipedia references]]

  * vm.swappiness = 0 - swap only to avoid an OOM
  * vm.swappiness = 1 - minimum amount of swapping without disabling it completely
  * vm.swappiness = 10 - recommended value when sufficient memory exists in a system
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