vacuumdb

vacuumdb

Garbage-collects and analyzes a database.

Synopsis

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

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

vacuumdb --help 

vacuumdb --version

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. There is no effective difference between vacuuming databases via this utility and via other methods for accessing the server.

Options

-a | --all
Vacuums all databases.
[-d] dbname | [--dbname] dbname
The name of the database to vacuum. If this is not specified and -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 reindexdb generates and sends to the server.
-f | --full
Selects a full vacuum, which may reclaim more space, but takes much longer and exclusively locks the table.
Warning: A VACUUM FULL is not recommended in Greenplum Database.
-F | --freeze
Freeze row transaction information.
-q | --quiet
Do not display a response.
-t table [(column)] | --table table [(column)]
Clean or analyze this table only. Column names may be specified only in conjunction with the --analyze option. If you specify columns, you probably have to escape the parentheses from the shell.
-v | --verbose
Print detailed information during processing.
-z | --analyze
Collect statistics for use by the query planner.
Connection Options
-h host | --host host
Specifies the host name of the machine on which the Greenplum master database server is running. If not specified, reads from the environment variable PGHOST or defaults to localhost.
-p port | --port port
Specifies the TCP port on which the Greenplum master database server is listening for connections. If not specified, reads from the environment variable PGPORT or defaults to 5432.
-U username | --username username
The database role name to connect as. If not specified, reads from the environment variable PGUSER or defaults to the current system user name.
-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 a password prompt.

Notes

vacuumdb might need to connect several times to the master server, asking for a password each time. It is convenient to have a ~/.pgpass file in such cases.

Examples

To clean the database test:

vacuumdb test

To clean and analyze a database named bigdb:

vacuumdb --analyze bigdb

To clean a single table foo in a database named mydb, and analyze a single column bar of the table. Note the quotes around the table and column names to escape the parentheses from the shell:

vacuumdb --analyze --verbose --table 'foo(bar)' mydb

See Also

VACUUM, ANALYZE