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Update information about configuring SysV IPC parameters on NetBSD.

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Per Emmanuel Kasper, sysctl works fine as of NetBSD 5.0.
This commit is contained in:
Tom Lane 2011-11-30 20:55:18 -05:00
parent b06231a974
commit 50be28d2ac
1 changed files with 44 additions and 17 deletions
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61
doc/src/sgml/runtime.sgml
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@ -315,10 +315,11 @@ fi
<listitem>
<para>
On <productname>NetBSD</productname>, either use the
On <productname>NetBSD</productname>, use either the
<productname>FreeBSD</productname> or
<productname>Linux</productname> start scripts, depending on
preference. <indexterm><primary>NetBSD</><secondary>start script</secondary></>
preference.
<indexterm><primary>NetBSD</><secondary>start script</secondary></>
</para>
</listitem>
@ -829,17 +830,45 @@ options "SEMMNS=240"
</para>
<para>
<systemitem class="osname">FreeBSD</> versions before 4.0 work like
<systemitem class="osname">NetBSD</> and <systemitem class="osname">
OpenBSD</> (see below).
<systemitem class="osname">FreeBSD</> versions before 4.0 work like
<systemitem class="osname">OpenBSD</> (see below).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><systemitem class="osname">NetBSD</></term>
<term><systemitem class="osname">OpenBSD</></term>
<indexterm><primary>NetBSD</><secondary>IPC configuration</></>
<listitem>
<para>
In <systemitem class="osname">NetBSD</> 5.0 and later,
IPC parameters can be adjusted using <command>sysctl</command>,
for example:
<screen>
<prompt>$</prompt> <userinput>sysctl -w kern.ipc.shmmax=16777216</userinput>
</screen>
To have these settings persist over reboots, modify
<filename>/etc/sysctl.conf</filename>.
</para>
<para>
You might also want to configure your kernel to lock shared
memory into RAM and prevent it from being paged out to swap.
This can be accomplished using the <command>sysctl</command>
setting <literal>kern.ipc.shm_use_phys</literal>.
</para>
<para>
<systemitem class="osname">NetBSD</> versions before 5.0 work like
<systemitem class="osname">OpenBSD</> (see below), except that
parameters should be set with the keyword <literal>options</> not
<literal>option</>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><systemitem class="osname">OpenBSD</></term>
<indexterm><primary>OpenBSD</><secondary>IPC configuration</></>
<listitem>
<para>
@ -847,18 +876,17 @@ options "SEMMNS=240"
to be enabled when the kernel is compiled. (They are by
default.) The maximum size of shared memory is determined by
the option <varname>SHMMAXPGS</> (in pages). The following
shows an example of how to set the various parameters
(<systemitem class="osname">OpenBSD</> uses <literal>option</> instead):
shows an example of how to set the various parameters:
<programlisting>
options SYSVSHM
options SHMMAXPGS=4096
options SHMSEG=256
option SYSVSHM
option SHMMAXPGS=4096
option SHMSEG=256
options SYSVSEM
options SEMMNI=256
options SEMMNS=512
options SEMMNU=256
options SEMMAP=256
option SYSVSEM
option SEMMNI=256
option SEMMNS=512
option SEMMNU=256
option SEMMAP=256
</programlisting>
</para>
@ -871,7 +899,6 @@ options SEMMAP=256
</listitem>
</varlistentry>
<varlistentry>
<term><systemitem class="osname">HP-UX</></term>
<indexterm><primary>HP-UX</><secondary>IPC configuration</></>