<command>loader</command> interfaces. The following

parameters can be set using <command>sysctl</command>:

<screen>

<prompt>$</prompt> <userinput>sysctl -w kern.ipc.shmall=32768</userinput>

<prompt>$</prompt> <userinput>sysctl -w kern.ipc.shmmax=134217728</userinput>

<prompt>$</prompt> <userinput>sysctl -w kern.ipc.semmap=256</userinput>

<prompt>#</prompt> <userinput>sysctl kern.ipc.shmall=32768</userinput>

<prompt>#</prompt> <userinput>sysctl kern.ipc.shmmax=134217728</userinput>

</screen>

Tohave these settings persist over reboots, modify

Tomake these settings persist over reboots, modify

<filename>/etc/sysctl.conf</filename>.

</para>

<para>

The remaining semaphore settings are read-only as far as

<command>sysctl</command> is concerned, but can be changed

before boot using the <command>loader</command> prompt:

<screen>

<prompt>(loader)</prompt> <userinput>set kern.ipc.semmni=256</userinput>

<prompt>(loader)</prompt> <userinput>set kern.ipc.semmns=512</userinput>

<prompt>(loader)</prompt> <userinput>set kern.ipc.semmnu=256</userinput>

</screen>

Similarly these can be saved between reboots in

<filename>/boot/loader.conf</filename>.

These semaphore-related settings are read-only as far as

<command>sysctl</command> is concerned, but can be set in

<filename>/boot/loader.conf</filename>:

<programlisting>

kern.ipc.semmni=256

kern.ipc.semmns=512

kern.ipc.semmnu=256

</programlisting>

After modifying these values a reboot is required for the new

settings to take effect.

(Note: FreeBSD does not use <varname>SEMMAP</>. Older versions

would accept but ignore a setting for <literal>kern.ipc.semmap</>;

newer versions reject it altogether.)

</para>

<para>