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298 lines
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298 lines
8.0 KiB
Plaintext
<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/vacuumdb.sgml,v 1.16 2001/03/17 16:27:31 petere Exp $
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Postgres documentation
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-->
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<refentry id="APP-VACUUMDB">
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<docinfo>
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<date>2000-11-11</date>
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</docinfo>
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<refmeta>
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<refentrytitle id="APP-VACUUMDB-TITLE"><application>vacuumdb</application></refentrytitle>
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<manvolnum>1</manvolnum>
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<refmiscinfo>Application</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname id="vacuumdb">vacuumdb</refname>
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<refpurpose>Clean and analyze a <productname>Postgres</productname> database</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>vacuumdb</command>
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<arg rep="repeat"><replaceable>connection-options</replaceable></arg>
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<arg><arg>-d</arg> <replaceable>dbname</replaceable></arg>
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<group><arg>--analyze</arg><arg>-z</arg></group>
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<group><arg>--verbose</arg><arg>-v</arg></group>
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<arg>--table '<replaceable>table</replaceable>
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<arg>( <replaceable class="parameter">column</replaceable> [,...] )</arg>'
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</arg>
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<sbr>
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<command>vacuumdb</command>
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<arg rep="repeat"><replaceable>connection-options</replaceable></arg>
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<group><arg>--all</arg><arg>-a</arg></group>
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<group><arg>--analyze</arg><arg>-z</arg></group>
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<group><arg>--verbose</arg><arg>-v</arg></group>
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</cmdsynopsis>
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<refsect2 id="R2-APP-VACUUMDB-1">
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<title>
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Inputs
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</title>
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<para>
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<application>vacuumdb</application> accepts the following command line arguments:
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<variablelist>
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<varlistentry>
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<term>-d <replaceable class="parameter">dbname</replaceable></term>
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<term>--dbname <replaceable class="parameter">dbname</replaceable></term>
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<listitem>
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<para>
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Specifies the name of the database to be cleaned or analyzed.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-z</term>
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<term>--analyze</term>
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<listitem>
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<para>
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Calculate statistics on the database for use by the optimizer.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-a</term>
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<term>--alldb</term>
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<listitem>
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<para>
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Vacuum all databases.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-v</term>
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<term>--verbose</term>
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<listitem>
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<para>
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Print detailed information during processing.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-t <replaceable class="parameter">table</replaceable> [ (<replaceable class="parameter">column</replaceable> [,...]) ]</term>
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<term>--table <replaceable class="parameter">table</replaceable> [ (<replaceable class="parameter">column</replaceable> [,...]) ]</term>
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<listitem>
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<para>
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Clean or analyze <replaceable class="parameter">table</replaceable> only.
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Column names may be specified only in conjunction with
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the <option>--analyze</option> option.
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</para>
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<tip>
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<para>
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If you specify columns to vacuum, you probably have to escape the parentheses
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from the shell.
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</para>
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</tip>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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<para>
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<application>vacuumdb</application> also accepts
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the following command line arguments for connection parameters:
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<variablelist>
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<varlistentry>
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<term>-h <replaceable class="parameter">host</replaceable></term>
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<term>--host <replaceable class="parameter">host</replaceable></term>
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<listitem>
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<para>
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Specifies the hostname of the machine on which the
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<application>postmaster</application>
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is running. If host begins with a slash, it is used
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as the directory for the unix domain socket.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-p <replaceable class="parameter">port</replaceable></term>
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<term>--port <replaceable class="parameter">port</replaceable></term>
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<listitem>
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<para>
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Specifies the Internet TCP/IP port or local Unix domain socket file
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extension on which the <application>postmaster</application>
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is listening for connections.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-U <replaceable class="parameter">username</replaceable></term>
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<term>--username <replaceable class="parameter">username</replaceable></term>
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<listitem>
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<para>
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Username to connect as.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-W</term>
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<term>--password</term>
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<listitem>
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<para>
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Force password prompt.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-e</term>
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<term>--echo</term>
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<listitem>
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<para>
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Echo the commands that <application>vacuumdb</application> generates
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and sends to the backend.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-q</term>
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<term>--quiet</term>
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<listitem>
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<para>
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Do not display a response.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect2>
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<refsect2 id="R2-APP-VACUUMDB-2">
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<title>
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Outputs
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</title>
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<para>
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<variablelist>
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<varlistentry>
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<term><computeroutput>VACUUM</computeroutput></term>
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<listitem>
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<para>
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Everything went well.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><computeroutput>vacuumdb: Vacuum failed.</computeroutput></term>
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<listitem>
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<para>
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Something went wrong. <application>vacuumdb</application> is only a wrapper
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script. See <xref linkend="SQL-VACUUM" endterm="SQL-VACUUM-title">
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and <xref linkend="APP-PSQL"> for a detailed
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discussion of error messages and potential problems.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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<para>
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</para>
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</refsect2>
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</refsynopsisdiv>
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<refsect1 id="R1-APP-VACUUMDB-1">
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<title>
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Description
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</title>
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<para>
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<application>vacuumdb</application> is a utility for cleaning a
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<productname>Postgres</productname> database.
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<application>vacuumdb</application> will also generate internal statistics
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used by the <productname>Postgres</productname> query optimizer.
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</para>
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<para>
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<application>vacuumdb</application> is a shell script wrapper around the
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backend command
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<xref linkend="SQL-VACUUM" endterm="SQL-VACUUM-title"> via
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the <productname>Postgres</productname> interactive terminal
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<xref linkend="APP-PSQL">. There is no effective
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difference between vacuuming databases via this or other methods.
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<application>psql</application> must be found by the script and
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a database server must be running at the targeted host. Also, any default
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settings and environment variables available to <application>psql</application>
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and the <application>libpq</application> front-end library do apply.
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</para>
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</refsect1>
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<refsect1 id="R1-APP-VACUUMDB-3">
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<title>Usage</title>
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<informalexample>
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<para>
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To clean the database <literal>test</literal>:
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<screen>
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<prompt>$ </prompt><userinput>vacuumdb test</userinput>
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</screen>
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</para>
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</informalexample>
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<informalexample>
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<para>
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To analyze for the optimzer a database named
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<literal>bigdb</literal>:
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<screen>
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<prompt>$ </prompt><userinput>vacuumdb --analyze bigdb</userinput>
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</screen>
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</para>
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</informalexample>
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<informalexample>
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<para>
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To analyze a single column <literal>bar</literal> in table
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<literal>foo</literal> in a database named
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<literal>xyzzy</literal> for the optimizer:
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<screen>
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<prompt>$ </prompt><userinput>vacuumdb --analyze --verbose --table 'foo(bar)' xyzzy</userinput>
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</screen>
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</para>
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</informalexample>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:nil
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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sgml-parent-document:nil
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sgml-default-dtd-file:"../reference.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:"/usr/lib/sgml/catalog"
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sgml-local-ecat-files:nil
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End:
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-->
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