vacuumdb1Applicationvacuumdbgarbage-collect and analyze a PostgreSQL databasevacuumdbvacuumdbconnection-option--full-f--verbose-v--analyze-z--table | -t table( column [,...] )dbnamevacuumdbconnection-options--all-a--full-f--verbose-v--analyze-zDescriptionvacuumdb 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 .
There is no effective difference between vacuuming databases via
this utility and via other methods for accessing the server.
Optionsvacuumdb accepts the following command-line arguments:
Vacuum all databases.
Specifies the name of the database to be cleaned or analyzed.
If this is not specified and (or
) 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.
Echo the commands that vacuumdb generates
and sends to the server.
Perform full vacuuming.
Do not display progress messages.
Clean or analyze table only.
Column names can be specified only in conjunction with
the option.
If you specify columns, you probably have to escape the parentheses
from the shell. (See examples below.)
Print detailed information during processing.
Calculate statistics for use by the optimizer.
vacuumdb also accepts
the following command-line arguments for connection parameters:
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.
Specifies the TCP port or local Unix domain socket file
extension on which the server
is listening for connections.
User name to connect as
Force password prompt.
EnvironmentPGDATABASEPGHOSTPGPORTPGUSER
Default connection parameters
This utility, like most other PostgreSQL> utilities,
also uses the environment variables supported by libpq>
(see ).
Diagnostics
In case of difficulty, see and 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.
Notesvacuumdb 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 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)' xyzzySee Also