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Garbage-collects and analyzes a database.
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
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.
- -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.
- -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.
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.
To clean the database 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