git.postgresql.org Git - postgresql.git/commitdiff

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-$PostgreSQL: pgsql/doc/src/sgml/runtime.sgml,v 1.363 2006年03月04日 03:47:29 momjian Exp $

+$PostgreSQL: pgsql/doc/src/sgml/runtime.sgml,v 1.364 2006年03月05日 03:50:44 tgl Exp $

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<chapter Id="runtime">

sysctl -w kern.sysv.shmseg

sysctl -w kern.sysv.shmall

</programlisting>

+ </para>

+

+ <para>

In OS X 10.3 and later, these commands have been moved to

<filename>/etc/rc</> and must be edited there. Note that

<filename>/etc/rc</> is usually overwritten by OS X updates (such as

10.3.6 to 10.3.7) so you should expect to have to redo your editing

- after each update. In all versions, you'll need to reboot to make

- changes take effect.

+ after each update.

+ </para>

+

+ <para>

+ In OS X 10.3.9 and later, instead of editing <filename>/etc/rc</>

+ you may create a file named <filename>/etc/sysctl.conf</>,

+ containing variable assignments such as

+<programlisting>

+kern.sysv.shmmax=4194304

+kern.sysv.shmmin=1

+kern.sysv.shmmni=32

+kern.sysv.shmseg=8

+kern.sysv.shmall=1024

+</programlisting>

+ This method is better than editing <filename>/etc/rc</> because

+ your changes will be preserved across system updates. Note that

+ <emphasis>all five</> shared-memory parameters must be set in

+ <filename>/etc/sysctl.conf</>, else the values will be ignored.

+ </para>

+

+ <para>

+ Beware that recent releases of OS X ignore attempts to set

+ <varname>SHMMAX</> to a value that isn't an exact multiple of 4096.

</para>

<para>

- In OS X 10.3.9 and later, the file <filename>/etc/sysctl.conf</>

- allows shared memory setting to be saved across operating system

- upgrades, and is the recommended method for setting these

- parameters. When using this file, all five shared memory values

- must be set or the changes will be ignored.

+ <varname>SHMALL</> is measured in 4KB pages on this platform.

</para>

<para>

- <varname>SHMALL</> is measured in 4KB pages on this platform,

- and recent releases of OS X reject attempts to set

- and <varname>SHMMAX</> to a value that isn't an exact

- multiple of 4096.

+ In all OS X versions, you'll need to reboot to make changes in the

+ shared memory parameters take effect.

</para>

</listitem>

</varlistentry>