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VACUUMDB(1)			  PostgreSQL 9.2.7 Documentation		      VACUUMDB(1)

NAME
       vacuumdb - garbage-collect and analyze a PostgreSQL database

SYNOPSIS
       vacuumdb [connection-option...] [option...] [--table | -t table [( column [,...] )]]
		[dbname]

       vacuumdb [connection-option...] [option...] --all | -a

DESCRIPTION
       vacuumdb is a utility for cleaning a PostgreSQL database.  vacuumdb will also generate
       internal statistics used by the PostgreSQL query optimizer.

       vacuumdb is a wrapper around the SQL command VACUUM(7). There is no effective difference
       between vacuuming and analyzing databases via this utility and via other methods for
       accessing the server.

OPTIONS
       vacuumdb accepts the following command-line arguments:

       -a, --all
	   Vacuum all databases.

       [-d] dbname, [--dbname=]dbname
	   Specifies the name of the database to be cleaned or analyzed. If this is not specified
	   and -a (or --all) is not used, the database name is read from the environment variable
	   PGDATABASE. If that is not set, the user name specified for the connection is used.

       -e, --echo
	   Echo the commands that vacuumdb generates and sends to the server.

       -f, --full
	   Perform "full" vacuuming.

       -F, --freeze
	   Aggressively "freeze" tuples.

       -q, --quiet
	   Do not display progress messages.

       -t table [ (column [,...]) ], --table=table [ (column [,...]) ]
	   Clean or analyze table only. Column names can be specified only in conjunction with
	   the --analyze or --analyze-only options.

	       Tip
	       If you specify columns, you probably have to escape the parentheses from the
	       shell. (See examples below.)

       -v, --verbose
	   Print detailed information during processing.

       -V, --version
	   Print the vacuumdb version and exit.

       -z, --analyze
	   Also calculate statistics for use by the optimizer.

       -Z, --analyze-only
	   Only calculate statistics for use by the optimizer (no vacuum).

       -?, --help
	   Show help about vacuumdb command line arguments, and exit.

       vacuumdb also accepts the following command-line arguments for connection parameters:

       -h host, --host=host
	   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 port, --port=port
	   Specifies the TCP port or local Unix domain socket file extension on which the server
	   is listening for connections.

       -U username, --username=username
	   User name to connect as.

       -w, --no-password
	   Never issue a password prompt. If the server requires password authentication and a
	   password is not available by other means such as a .pgpass 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.

       -W, --password
	   Force vacuumdb to prompt for a password before connecting to a database.

	   This option is never essential, since vacuumdb will automatically prompt for a
	   password if the server demands password authentication. However, vacuumdb will waste a
	   connection attempt finding out that the server wants a password. In some cases it is
	   worth typing -W to avoid the extra connection attempt.

       --maintenance-db=dbname
	   Specifies the name of the database to connect to discover what other databases should
	   be vacuumed. If not specified, the postgres database will be used, and if that does
	   not exist, template1 will be used.

ENVIRONMENT
       PGDATABASE, PGHOST, PGPORT, PGUSER
	   Default connection parameters

       This utility, like most other PostgreSQL utilities, also uses the environment variables
       supported by libpq (see Section 31.14, "Environment Variables", in the documentation).

DIAGNOSTICS
       In case of difficulty, see VACUUM(7) and psql(1) 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 libpq front-end library
       will apply.

NOTES
       vacuumdb might need to connect several times to the PostgreSQL server, asking for a
       password each time. It is convenient to have a ~/.pgpass file in such cases. See Section
       31.15, "The Password File", in the documentation for more information.

EXAMPLES
       To clean the database test:

	   $ vacuumdb test

       To clean and analyze for the optimizer a database named bigdb:

	   $ vacuumdb --analyze bigdb

       To clean a single table foo in a database named xyzzy, and analyze a single column bar of
       the table for the optimizer:

	   $ vacuumdb --analyze --verbose --table 'foo(bar)' xyzzy

SEE ALSO
       VACUUM(7)

PostgreSQL 9.2.7			    2014-02-17				      VACUUMDB(1)
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