diff options
Diffstat (limited to '')
| -rw-r--r-- | doc/src/sgml/ref/clusterdb.sgml | 352 |
1 files changed, 352 insertions, 0 deletions
diff --git a/doc/src/sgml/ref/clusterdb.sgml b/doc/src/sgml/ref/clusterdb.sgml new file mode 100644 index 0000000..c838b22 --- /dev/null +++ b/doc/src/sgml/ref/clusterdb.sgml @@ -0,0 +1,352 @@ +<!-- +doc/src/sgml/ref/clusterdb.sgml +PostgreSQL documentation +--> + +<refentry id="app-clusterdb"> + <indexterm zone="app-clusterdb"> + <primary>clusterdb</primary> + </indexterm> + + <refmeta> + <refentrytitle><application>clusterdb</application></refentrytitle> + <manvolnum>1</manvolnum> + <refmiscinfo>Application</refmiscinfo> + </refmeta> + + <refnamediv> + <refname>clusterdb</refname> + <refpurpose>cluster a <productname>PostgreSQL</productname> database</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <cmdsynopsis> + <command>clusterdb</command> + <arg rep="repeat"><replaceable>connection-option</replaceable></arg> + <group choice="opt"><arg choice="plain"><option>--verbose</option></arg><arg choice="plain"><option>-v</option></arg></group> + + <arg choice="plain" rep="repeat"> + <arg choice="opt"> + <group choice="plain"> + <arg choice="plain"><option>--table</option></arg> + <arg choice="plain"><option>-t</option></arg> + </group> + <replaceable>table</replaceable> + </arg> + </arg> + + <arg choice="opt"><replaceable>dbname</replaceable></arg> + </cmdsynopsis> + + <cmdsynopsis> + <command>clusterdb</command> + <arg rep="repeat"><replaceable>connection-option</replaceable></arg> + <group choice="opt"><arg choice="plain"><option>--verbose</option></arg><arg choice="plain"><option>-v</option></arg></group> + <group choice="plain"><arg choice="plain"><option>--all</option></arg><arg choice="plain"><option>-a</option></arg></group> + </cmdsynopsis> + </refsynopsisdiv> + + + <refsect1> + <title>Description</title> + + <para> + <application>clusterdb</application> is a utility for reclustering tables + in a <productname>PostgreSQL</productname> database. It finds tables + that have previously been clustered, and clusters them again on the same + index that was last used. Tables that have never been clustered are not + affected. + </para> + + <para> + <application>clusterdb</application> is a wrapper around the SQL + command <xref linkend="sql-cluster"/>. + There is no effective difference between clustering databases via + this utility and via other methods for accessing the server. + </para> + + </refsect1> + + + <refsect1> + <title>Options</title> + + <para> + <application>clusterdb</application> accepts the following command-line arguments: + + <variablelist> + <varlistentry> + <term><option>-a</option></term> + <term><option>--all</option></term> + <listitem> + <para> + Cluster all databases. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option><optional>-d</optional> <replaceable class="parameter">dbname</replaceable></option></term> + <term><option><optional>--dbname=</optional><replaceable class="parameter">dbname</replaceable></option></term> + <listitem> + <para> + Specifies the name of the database to be clustered, + when <option>-a</option>/<option>--all</option> is not used. + If this is not specified, the database name is read + from the environment variable <envar>PGDATABASE</envar>. If + that is not set, the user name specified for the connection is + used. The <replaceable>dbname</replaceable> can be a <link + linkend="libpq-connstring">connection string</link>. If so, + connection string parameters will override any conflicting command + line options. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>-e</option></term> + <term><option>--echo</option></term> + <listitem> + <para> + Echo the commands that <application>clusterdb</application> generates + and sends to the server. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>-q</option></term> + <term><option>--quiet</option></term> + <listitem> + <para> + Do not display progress messages. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>-t <replaceable class="parameter">table</replaceable></option></term> + <term><option>--table=<replaceable class="parameter">table</replaceable></option></term> + <listitem> + <para> + Cluster <replaceable class="parameter">table</replaceable> only. + Multiple tables can be clustered by writing multiple + <option>-t</option> switches. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>-v</option></term> + <term><option>--verbose</option></term> + <listitem> + <para> + Print detailed information during processing. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>-V</option></term> + <term><option>--version</option></term> + <listitem> + <para> + Print the <application>clusterdb</application> version and exit. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>-?</option></term> + <term><option>--help</option></term> + <listitem> + <para> + Show help about <application>clusterdb</application> command line + arguments, and exit. + </para> + </listitem> + </varlistentry> + + </variablelist> + </para> + + <para> + <application>clusterdb</application> also accepts + the following command-line arguments for connection parameters: + + <variablelist> + <varlistentry> + <term><option>-h <replaceable class="parameter">host</replaceable></option></term> + <term><option>--host=<replaceable class="parameter">host</replaceable></option></term> + <listitem> + <para> + Specifies the host name of the machine on which the server is + running. If the value begins with a slash, it is used as the + directory for the Unix domain socket. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>-p <replaceable class="parameter">port</replaceable></option></term> + <term><option>--port=<replaceable class="parameter">port</replaceable></option></term> + <listitem> + <para> + Specifies the TCP port or local Unix domain socket file + extension on which the server + is listening for connections. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>-U <replaceable class="parameter">username</replaceable></option></term> + <term><option>--username=<replaceable class="parameter">username</replaceable></option></term> + <listitem> + <para> + User name to connect as. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>-w</option></term> + <term><option>--no-password</option></term> + <listitem> + <para> + Never issue a password prompt. If the server requires + password authentication and a password is not available by + other means such as a <filename>.pgpass</filename> file, the + connection attempt will fail. This option can be useful in + batch jobs and scripts where no user is present to enter a + password. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>-W</option></term> + <term><option>--password</option></term> + <listitem> + <para> + Force <application>clusterdb</application> to prompt for a + password before connecting to a database. + </para> + + <para> + This option is never essential, since + <application>clusterdb</application> will automatically prompt + for a password if the server demands password authentication. + However, <application>clusterdb</application> will waste a + connection attempt finding out that the server wants a password. + In some cases it is worth typing <option>-W</option> to avoid the extra + connection attempt. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>--maintenance-db=<replaceable class="parameter">dbname</replaceable></option></term> + <listitem> + <para> + Specifies the name of the database to connect to to discover which + databases should be clustered, + when <option>-a</option>/<option>--all</option> is used. + If not specified, the <literal>postgres</literal> database will be used, + or if that does not exist, <literal>template1</literal> will be used. + This can be a <link linkend="libpq-connstring">connection + string</link>. If so, connection string parameters will override any + conflicting command line options. Also, connection string parameters + other than the database name itself will be re-used when connecting + to other databases. + </para> + </listitem> + </varlistentry> + </variablelist> + </para> + </refsect1> + + + <refsect1> + <title>Environment</title> + + <variablelist> + <varlistentry> + <term><envar>PGDATABASE</envar></term> + <term><envar>PGHOST</envar></term> + <term><envar>PGPORT</envar></term> + <term><envar>PGUSER</envar></term> + + <listitem> + <para> + Default connection parameters + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><envar>PG_COLOR</envar></term> + <listitem> + <para> + Specifies whether to use color in diagnostic messages. Possible values + are <literal>always</literal>, <literal>auto</literal> and + <literal>never</literal>. + </para> + </listitem> + </varlistentry> + </variablelist> + + <para> + This utility, like most other <productname>PostgreSQL</productname> utilities, + also uses the environment variables supported by <application>libpq</application> + (see <xref linkend="libpq-envars"/>). + </para> + + </refsect1> + + + <refsect1> + <title>Diagnostics</title> + + <para> + In case of difficulty, see <xref linkend="sql-cluster"/> + and <xref linkend="app-psql"/> for + discussions of potential problems and error messages. + The database server must be running at the + targeted host. Also, any default connection settings and environment + variables used by the <application>libpq</application> front-end + library will apply. + </para> + + </refsect1> + + + <refsect1> + <title>Examples</title> + + <para> + To cluster the database <literal>test</literal>: +<screen> +<prompt>$ </prompt><userinput>clusterdb test</userinput> +</screen> + </para> + + <para> + To cluster a single table + <literal>foo</literal> in a database named + <literal>xyzzy</literal>: +<screen> +<prompt>$ </prompt><userinput>clusterdb --table=foo xyzzy</userinput> +</screen></para> + + </refsect1> + + <refsect1> + <title>See Also</title> + + <simplelist type="inline"> + <member><xref linkend="sql-cluster"/></member> + </simplelist> + </refsect1> + +</refentry> |