VACUUMDB(1)						  PostgreSQL Client Applications					       VACUUMDB(1)

NAME

       vacuumdb - garbage-collect and analyze a PostgreSQL database

SYNOPSIS

       vacuumdb  [  connection-option... ]  [  [ --full ]  [ -f ]  ]  [  [ --verbose ]	[ -v ]	]  [  [ --analyze ]  [ -z ]  ]	[  [ --freeze ]  [
       -F ]  ]	[ --table | -t table
	[ ( column [,...] ) ]
	]  [ dbname ]

       vacuumdb [ connection-options... ]  [  [ --all ]  [ -a ]  ]  [  [ --full ]  [ -f ]  ]  [  [ --verbose ]	[ -v ]	]  [  [ --analyze ]  [	-z
       ]  ]  [	[ --freeze ]  [ -F ]  ]

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 [vacuum(7)].  There is no effective difference between  vacuuming  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.

       -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 option.

	      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.

       -z

       --analyze
	      Calculate statistics for use by the optimizer.

       -F

       --freeze
	      Aggressively ``freeze'' tuples.

       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 authentica-
	      tion.  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.

ENVIRONMENT

       PGDATABASE

       PGHOST

       PGPORT

       PGUSER Default connection parameters

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

DIAGNOSTICS

       In  case  of  difficulty, see VACUUM [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 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 [vacuum(7)]

Application							    2010-05-14							       VACUUMDB(1)