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Update initdb locale/encoding documentation description. Backpatch to

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8.0.X.
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Bruce Momjian
2005-02-22 02:54:19 +00:00
parent 1808ce7865
commit 78bb800bc2
1 changed files with 36 additions and 34 deletions
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68
doc/src/sgml/ref/initdb.sgml
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@@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/initdb.sgml,v 1.33 2005/01/04 00:05:45 momjian Exp $
$PostgreSQL: pgsql/doc/src/sgml/ref/initdb.sgml,v 1.34 2005/02/22 02:54:19 momjian Exp $
PostgreSQL documentation
-->
@@ -43,34 +43,23 @@ PostgreSQL documentation
</para>
<para>
Creating a database cluster consists of creating the directories in which
the database data will live, generating the shared catalog tables
(tables that belong to the whole cluster rather than to any particular
database), and creating the <literal>template1</literal>
Creating a database cluster consists of creating the directories in
which the database data will live, generating the shared catalog
tables (tables that belong to the whole cluster rather than to any
particular database), and creating the <literal>template1</literal>
database. When you later create a new database, everything in the
<literal>template1</literal> database is copied.
It contains catalog tables filled in for things like the
built-in types.
<literal>template1</literal> database is copied. It contains catalog
tables containing things like built-in data types.
</para>
<para>
<command>initdb</command> initializes the database cluster's default
locale and character set encoding. Some locale categories are fixed
for the lifetime of the cluster. There is also a performance impact
in using locales other than <literal>C</> or <literal>POSIX</>.
Therefore it is important to make the right choice when running
<command>initdb</command>. Other locale categories can be changed
later when the server is started. <command>initdb</command> will
write those locale settings into the
<filename>postgresql.conf</filename> configuration file so they are
the default, but they can be changed by editing that file. To set the
locale that <command>initdb</command> uses, see the description of
the <option>--locale</option> option. The character set encoding can
be set separately for each database as it is created.
<command>initdb</command> determines the encoding for the
<literal>template1</literal> database, which will serve as the
default for all other databases. To alter the default encoding use
the <option>--encoding</option> option.
Although <command>initdb</command> will attempt to create the
specified data directory, it might not have permission if the parent
directory of the desired data directory is root-owned. To initialize
in such a setup, create an empty data directory as root, then use
<command>chown</command> to assign ownership of that directory to the
database user account, then <command>su</command> to become the
database user to run <command>initdb</command>.
</para>
<para>
@@ -83,15 +72,28 @@ PostgreSQL documentation
</para>
<para>
Although <command>initdb</command> will attempt to create the
specified data directory, often it won't have permission to do so,
since the parent of the desired data directory is often a root-owned
directory. To set up an arrangement like this, create an empty data
directory as root, then use <command>chown</command> to hand over
ownership of that directory to the database user account, then
<command>su</command> to become the database user, and
finally run <command>initdb</command> as the database user.
<command>initdb</command> initializes the database cluster's default
locale and character set encoding. The collation order
(<literal>LC_COLLATE</>) and character set classes
(<literal>LC_CTYPE</>, e.g. upper, lower, digit) are fixed for all
databases and can not be changed. Collation orders other than
<literal>C</> or <literal>POSIX</> also have a performance penalty.
For these reasons it is important to choose the right locale when
running <command>initdb</command>. The remaining locale categories
can be changed later when the server is started. All server locale
values (<literal>lc_*</>) can be displayed via <command>SHOW ALL</>.
More details can be found in <xref linkend="locale">.
</para>
<para>
The character set encoding can be set separately for a database when
it is created. <command>initdb</command> determines the encoding for
the <literal>template1</literal> database, which will serve as the
default for all other databases. To alter the default encoding use
the <option>--encoding</option> option. More details can be found in
<xref linkend="multibyte">.
</para>
</refsect1>
<refsect1>