[Fwd: Re: [DOCS] Instructions for FreeBSD ipc config showing age] - Mailing list pgsql-patches
From | Mark Kirkwood |
---|---|
Subject | [Fwd: Re: [DOCS] Instructions for FreeBSD ipc config showing age] |
Date | |
Msg-id | 42005834.9020306@coretech.co.nz Whole thread Raw |
Responses |
Re: [Fwd: Re: [DOCS] Instructions for FreeBSD ipc config
Re: [Fwd: Re: [DOCS] Instructions for FreeBSD ipc config showing |
List | pgsql-patches |
As discussed on -docs. (Not really sure if I need to explicitly forward here....) regards Mark Tom Lane wrote: > > > This seems a bit awkwardly phrased: > > >>+ <para> >>+ Versions before 4.0 will require a kernel rebuild, see the >>+ <systemitem class="osname">NetBSD</> and <systemitem >>+ class="osname">OpenBSD</> instructions above, however the key word is >>+ <literal>options</literal> (plural) in this case. >> </para> > > > Perhaps > > FreeBSD versions before 4.0 work like NetBSD and OpenBSD (see above), > except that the configuration file uses the key word "options" > instead of "option". > Yeah - much nicer. > Also, alphabetization would suggest putting the FreeBSD entry before the > other two, not after, so maybe that should be "see below". Thanks - had not considered that! Amended patch attached. regards Mark --- runtime.sgml.orig Sat Jan 29 18:30:50 2005 +++ runtime.sgml Tue Feb 1 14:25:53 2005 @@ -4351,9 +4351,51 @@ <varlistentry> <term><systemitem class="osname">FreeBSD</></term> + <indexterm><primary>FreeBSD</><secondary>IPC configuration</></> + <listitem> + <para> + The default settings are only suitable for small installations + (default <varname>SHMMAX</varname> is 32 MB). Changes can be made via + the <command>sysctl</command> or <command>loader</command> interfaces. + Firstly the ones that are settable using <command>sysctl</command>: +<screen> +<prompt>$</prompt> <userinput>systcl -w kern.ipc.shmall=32768</userinput> +<prompt>$</prompt> <userinput>systcl -w kern.ipc.shmmax=134217728</userinput> +<prompt>$</prompt> <userinput>systcl -w kern.ipc.semmap=256</userinput> +</screen> + These to be saved between reboots in <filename>/etc/sysctl.conf. + </para> + <para> + The remaining sempahore 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>. + </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. + Use the <command>sysctl</> setting + <literal>kern.ipc.shm_use_phys</>. + </para> + <para> + <systemitem class="osname">FreeBSD</> versions before 4.0 work like + <systemitem class="osname">NetBSD</> and <systemitem class="osname"> + OpenBSD</> (see below), except that the configuration file uses the + key word "options" instead of "option". + </para> + </listitem> + </varlistentry> + + + <varlistentry> <term><systemitem class="osname">NetBSD</></term> <term><systemitem class="osname">OpenBSD</></term> - <indexterm><primary>FreeBSD</><secondary>IPC configuration</></> <indexterm><primary>NetBSD</><secondary>IPC configuration</></> <indexterm><primary>OpenBSD</><secondary>IPC configuration</></> <listitem> @@ -4364,19 +4406,16 @@ the option <varname>SHMMAXPGS</> (in pages). The following 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> - (On <systemitem class="osname">NetBSD</> and <systemitem - class="osname">OpenBSD</> the key word is actually - <literal>option</literal> singular.) </para> <para> You might also want to configure your kernel to lock shared ---------------------------(end of broadcast)--------------------------- TIP 7: don't forget to increase your free space map settings
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