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><H1
><A
NAME="APP-VACUUMDB"
></A
><SPAN
CLASS="APPLICATION"
>vacuumdb</SPAN
></H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN86344"
></A
><H2
>Name</H2
>vacuumdb -- garbage-collect and analyze a <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> database</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN86350"
></A
><H2
>Synopsis</H2
><P
><TT
CLASS="COMMAND"
>vacuumdb</TT
> [<TT
CLASS="REPLACEABLE"
><I
>connection-option</I
></TT
>...] [<TT
CLASS="REPLACEABLE"
><I
>option</I
></TT
>...] [ <TT
CLASS="OPTION"
>--table</TT
> | <TT
CLASS="OPTION"
>-t</TT
>
<TT
CLASS="REPLACEABLE"
><I
>table</I
></TT
>
[( <TT
CLASS="REPLACEABLE"
><I
>column</I
></TT
> [,...] )]
] [<TT
CLASS="REPLACEABLE"
><I
>dbname</I
></TT
>]</P
><P
><TT
CLASS="COMMAND"
>vacuumdb</TT
> [<TT
CLASS="REPLACEABLE"
><I
>connection-option</I
></TT
>...] [<TT
CLASS="REPLACEABLE"
><I
>option</I
></TT
>...] <TT
CLASS="OPTION"
>--all</TT
> | <TT
CLASS="OPTION"
>-a</TT
> </P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN86379"
></A
><H2
>Description</H2
><P
> <SPAN
CLASS="APPLICATION"
>vacuumdb</SPAN
> is a utility for cleaning a
<SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> database.
<SPAN
CLASS="APPLICATION"
>vacuumdb</SPAN
> will also generate internal statistics
used by the <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> query optimizer.
</P
><P
> <SPAN
CLASS="APPLICATION"
>vacuumdb</SPAN
> is a wrapper around the SQL
command <A
HREF="sql-vacuum.html"
>VACUUM</A
>.
There is no effective difference between vacuuming and analyzing
databases via this utility and via other methods for accessing the
server.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN86389"
></A
><H2
>Options</H2
><P
> <SPAN
CLASS="APPLICATION"
>vacuumdb</SPAN
> accepts the following command-line arguments:
<P
></P
></P><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="OPTION"
>-a</TT
><BR><TT
CLASS="OPTION"
>--all</TT
></DT
><DD
><P
> Vacuum all databases.
</P
></DD
><DT
><TT
CLASS="OPTION"
>[<SPAN
CLASS="OPTIONAL"
>-d</SPAN
>] <TT
CLASS="REPLACEABLE"
><I
>dbname</I
></TT
></TT
><BR><TT
CLASS="OPTION"
>[<SPAN
CLASS="OPTIONAL"
>--dbname=</SPAN
>]<TT
CLASS="REPLACEABLE"
><I
>dbname</I
></TT
></TT
></DT
><DD
><P
> Specifies the name of the database to be cleaned or analyzed.
If this is not specified and <TT
CLASS="OPTION"
>-a</TT
> (or
<TT
CLASS="OPTION"
>--all</TT
>) is not used, the database name is read
from the environment variable <TT
CLASS="ENVAR"
>PGDATABASE</TT
>. If
that is not set, the user name specified for the connection is
used.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-e</TT
><BR><TT
CLASS="OPTION"
>--echo</TT
></DT
><DD
><P
> Echo the commands that <SPAN
CLASS="APPLICATION"
>vacuumdb</SPAN
> generates
and sends to the server.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-f</TT
><BR><TT
CLASS="OPTION"
>--full</TT
></DT
><DD
><P
> Perform <SPAN
CLASS="QUOTE"
>"full"</SPAN
> vacuuming.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-F</TT
><BR><TT
CLASS="OPTION"
>--freeze</TT
></DT
><DD
><P
> Aggressively <SPAN
CLASS="QUOTE"
>"freeze"</SPAN
> tuples.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-q</TT
><BR><TT
CLASS="OPTION"
>--quiet</TT
></DT
><DD
><P
> Do not display progress messages.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-t <TT
CLASS="REPLACEABLE"
><I
>table</I
></TT
> [ (<TT
CLASS="REPLACEABLE"
><I
>column</I
></TT
> [,...]) ]</TT
><BR><TT
CLASS="OPTION"
>--table=<TT
CLASS="REPLACEABLE"
><I
>table</I
></TT
> [ (<TT
CLASS="REPLACEABLE"
><I
>column</I
></TT
> [,...]) ]</TT
></DT
><DD
><P
> Clean or analyze <TT
CLASS="REPLACEABLE"
><I
>table</I
></TT
> only.
Column names can be specified only in conjunction with
the <TT
CLASS="OPTION"
>--analyze</TT
> or <TT
CLASS="OPTION"
>--analyze-only</TT
> options.
</P
><DIV
CLASS="TIP"
><BLOCKQUOTE
CLASS="TIP"
><P
><B
>Tip: </B
> If you specify columns, you probably have to escape the parentheses
from the shell. (See examples below.)
</P
></BLOCKQUOTE
></DIV
></DD
><DT
><TT
CLASS="OPTION"
>-v</TT
><BR><TT
CLASS="OPTION"
>--verbose</TT
></DT
><DD
><P
> Print detailed information during processing.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-V</TT
><BR><TT
CLASS="OPTION"
>--version</TT
></DT
><DD
><P
> Print the <SPAN
CLASS="APPLICATION"
>vacuumdb</SPAN
> version and exit.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-z</TT
><BR><TT
CLASS="OPTION"
>--analyze</TT
></DT
><DD
><P
> Also calculate statistics for use by the optimizer.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-Z</TT
><BR><TT
CLASS="OPTION"
>--analyze-only</TT
></DT
><DD
><P
> Only calculate statistics for use by the optimizer (no vacuum).
</P
></DD
><DT
><TT
CLASS="OPTION"
>-?</TT
><BR><TT
CLASS="OPTION"
>--help</TT
></DT
><DD
><P
> Show help about <SPAN
CLASS="APPLICATION"
>vacuumdb</SPAN
> command line
arguments, and exit.
</P
></DD
></DL
></DIV
><P>
</P
><P
> <SPAN
CLASS="APPLICATION"
>vacuumdb</SPAN
> also accepts
the following command-line arguments for connection parameters:
<P
></P
></P><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="OPTION"
>-h <TT
CLASS="REPLACEABLE"
><I
>host</I
></TT
></TT
><BR><TT
CLASS="OPTION"
>--host=<TT
CLASS="REPLACEABLE"
><I
>host</I
></TT
></TT
></DT
><DD
><P
> 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.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-p <TT
CLASS="REPLACEABLE"
><I
>port</I
></TT
></TT
><BR><TT
CLASS="OPTION"
>--port=<TT
CLASS="REPLACEABLE"
><I
>port</I
></TT
></TT
></DT
><DD
><P
> Specifies the TCP port or local Unix domain socket file
extension on which the server
is listening for connections.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-U <TT
CLASS="REPLACEABLE"
><I
>username</I
></TT
></TT
><BR><TT
CLASS="OPTION"
>--username=<TT
CLASS="REPLACEABLE"
><I
>username</I
></TT
></TT
></DT
><DD
><P
> User name to connect as.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-w</TT
><BR><TT
CLASS="OPTION"
>--no-password</TT
></DT
><DD
><P
> Never issue a password prompt. If the server requires
password authentication and a password is not available by
other means such as a <TT
CLASS="FILENAME"
>.pgpass</TT
> 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.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-W</TT
><BR><TT
CLASS="OPTION"
>--password</TT
></DT
><DD
><P
> Force <SPAN
CLASS="APPLICATION"
>vacuumdb</SPAN
> to prompt for a
password before connecting to a database.
</P
><P
> This option is never essential, since
<SPAN
CLASS="APPLICATION"
>vacuumdb</SPAN
> will automatically prompt
for a password if the server demands password authentication.
However, <SPAN
CLASS="APPLICATION"
>vacuumdb</SPAN
> will waste a
connection attempt finding out that the server wants a password.
In some cases it is worth typing <TT
CLASS="OPTION"
>-W</TT
> to avoid the extra
connection attempt.
</P
></DD
><DT
><TT
CLASS="OPTION"
>--maintenance-db=<TT
CLASS="REPLACEABLE"
><I
>dbname</I
></TT
></TT
></DT
><DD
><P
> Specifies the name of the database to connect to discover what other
databases should be vacuumed. If not specified, the
<TT
CLASS="LITERAL"
>postgres</TT
> database will be used,
and if that does not exist, <TT
CLASS="LITERAL"
>template1</TT
> will be used.
</P
></DD
></DL
></DIV
><P>
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN86557"
></A
><H2
>Environment</H2
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="ENVAR"
>PGDATABASE</TT
><BR><TT
CLASS="ENVAR"
>PGHOST</TT
><BR><TT
CLASS="ENVAR"
>PGPORT</TT
><BR><TT
CLASS="ENVAR"
>PGUSER</TT
></DT
><DD
><P
> Default connection parameters
</P
></DD
></DL
></DIV
><P
> This utility, like most other <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> utilities,
also uses the environment variables supported by <SPAN
CLASS="APPLICATION"
>libpq</SPAN
>
(see <A
HREF="libpq-envars.html"
>Section 31.14</A
>).
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN86575"
></A
><H2
>Diagnostics</H2
><P
> In case of difficulty, see <A
HREF="sql-vacuum.html"
>VACUUM</A
>
and <A
HREF="app-psql.html"
><SPAN
CLASS="APPLICATION"
>psql</SPAN
></A
> 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 <SPAN
CLASS="APPLICATION"
>libpq</SPAN
> front-end
library will apply.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN86581"
></A
><H2
>Notes</H2
><P
> <SPAN
CLASS="APPLICATION"
>vacuumdb</SPAN
> might need to connect several
times to the <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> server, asking
for a password each time. It is convenient to have a
<TT
CLASS="FILENAME"
>~/.pgpass</TT
> file in such cases. See <A
HREF="libpq-pgpass.html"
>Section 31.15</A
> for more information.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN86588"
></A
><H2
>Examples</H2
><P
> To clean the database <TT
CLASS="LITERAL"
>test</TT
>:
</P><PRE
CLASS="SCREEN"
><SAMP
CLASS="PROMPT"
>$ </SAMP
><KBD
CLASS="USERINPUT"
>vacuumdb test</KBD
></PRE
><P>
</P
><P
> To clean and analyze for the optimizer a database named
<TT
CLASS="LITERAL"
>bigdb</TT
>:
</P><PRE
CLASS="SCREEN"
><SAMP
CLASS="PROMPT"
>$ </SAMP
><KBD
CLASS="USERINPUT"
>vacuumdb --analyze bigdb</KBD
></PRE
><P>
</P
><P
> To clean a single table
<TT
CLASS="LITERAL"
>foo</TT
> in a database named
<TT
CLASS="LITERAL"
>xyzzy</TT
>, and analyze a single column
<TT
CLASS="LITERAL"
>bar</TT
> of the table for the optimizer:
</P><PRE
CLASS="SCREEN"
><SAMP
CLASS="PROMPT"
>$ </SAMP
><KBD
CLASS="USERINPUT"
>vacuumdb --analyze --verbose --table 'foo(bar)' xyzzy</KBD
></PRE
><P></P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN86607"
></A
><H2
>See Also</H2
><A
HREF="sql-vacuum.html"
>VACUUM</A
></DIV
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