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<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/pg_controldata.sgml,v 1.4 2002/08/17 05:07:18 tgl Exp $
PostgreSQL documentation
-->
<refentry id="APP-PGCONTROLDATA">
<refmeta>
<refentrytitle id="APP-PGCONTROLDATA-TITLE"><application>pg_controldata</application></refentrytitle>
<manvolnum>1</manvolnum>
<refmiscinfo>Application</refmiscinfo>
</refmeta>
<refnamediv>
<refname>pg_controldata</refname>
<refpurpose>display server-wide control information</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<command>pg_controldata</command>
<arg><replaceable class="parameter">datadir</replaceable></arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1 id="R1-APP-PGCONTROLDATA-1">
<title>Description</title>
<para>
<command>pg_controldata</command> returns information initialized during
<application>initdb</>, such as the catalog version and server locale.
It also shows information about write-ahead logging and checkpoint
processing. This information is server-wide, and not specific to any one
database.
</para>
<para>
This utility may only be run by the user who installed the server because
it requires read access to the <literal>datadir</>.
You can specify the data directory on the command line, or use
the environment variable <envar>PGDATA</>.
</para>
</refsect1>
<refsect1>
<title>Environment</title>
<variablelist>
<varlistentry>
<term><envar>PGDATA</envar></term>
<listitem>
<para>
Default data directory location
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
</refentry>
<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:nil
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
sgml-parent-document:nil
sgml-default-dtd-file:"../reference.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:"/usr/lib/sgml/catalog"
sgml-local-ecat-files:nil
End:
-->
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