reindexdb — reindex a PostgreSQL database
reindexdb [connection-option...] [option...]  
    [
       -S  |   --schema  
     schema
    ]
   ...   
    [
       -t  |   --table  
     table
    ]
   ...   
    [
       -i  |   --index  
     index
    ]
   ...  [dbname]
reindexdb [connection-option...] [option...]   -a  |   --all  
reindexdb [connection-option...] [option...]   -s  |   --system   [dbname]
reindexdb is a utility for rebuilding indexes in a PostgreSQL database.
   reindexdb is a wrapper around the SQL
   command REINDEX.
   There is no effective difference between reindexing databases via
   this utility and via other methods for accessing the server.
  
reindexdb accepts the following command-line arguments:
-a--allReindex all databases.
--concurrently
        Use the CONCURRENTLY option.  See
        REINDEX, where all the caveats of this option
        are explained in detail.
       
[-d] dbname[--dbname=]dbname
        Specifies the name of the database to be reindexed,
        when -a/--all is not used.
        If this is not specified, the database name is read
        from the environment variable PGDATABASE.  If
        that is not set, the user name specified for the connection is
        used.  The dbname can be a connection string.  If so,
        connection string parameters will override any conflicting command
        line options.
       
-e--echoEcho the commands that reindexdb generates and sends to the server.
-i index--index=index
        Recreate index only.
        Multiple indexes can be recreated by writing multiple
        -i switches.
       
-j njobs--jobs=njobs
        Execute the reindex commands in parallel by running
        njobs
        commands simultaneously.  This option may reduce the processing time
        but it also increases the load on the database server.
       
        reindexdb will open
        njobs connections to the
        database, so make sure your max_connections
        setting is high enough to accommodate all connections.
       
        Note that this option is incompatible with the --index
        and --system options.
       
-q--quietDo not display progress messages.
-s--systemReindex database's system catalogs only.
-S schema--schema=schema
        Reindex schema only.
        Multiple schemas can be reindexed by writing multiple
        -S switches.
       
-t table--table=table
        Reindex table only.
        Multiple tables can be reindexed by writing multiple
        -t switches.
       
--tablespace=tablespaceSpecifies the tablespace where indexes are rebuilt. (This name is processed as a double-quoted identifier.)
-v--verbosePrint detailed information during processing.
-V--versionPrint the reindexdb version and exit.
-?--helpShow help about reindexdb command line arguments, and exit.
reindexdb also accepts the following command-line arguments for connection parameters:
-h host--host=hostSpecifies 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=portSpecifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.
-U username--username=usernameUser 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--passwordForce reindexdb to prompt for a password before connecting to a database.
        This option is never essential, since
        reindexdb will automatically prompt
        for a password if the server demands password authentication.
        However, reindexdb 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 to discover which
        databases should be reindexed,
        when -a/--all is used.
        If not specified, the postgres database will be used,
        or if that does not exist, template1 will be used.
        This can be a connection
        string.  If so, connection string parameters will override any
        conflicting command line options.  Also, connection string parameters
        other than the database name itself will be re-used when connecting
        to other databases.
       
PGDATABASEPGHOSTPGPORTPGUSERDefault connection parameters
PG_COLOR
      Specifies whether to use color in diagnostic messages. Possible values
      are always, auto and
      never.
     
This utility, like most other PostgreSQL utilities, also uses the environment variables supported by libpq (see Section 34.15).
In case of difficulty, see REINDEX and psql 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.
   reindexdb 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 34.16 for more information.
  
    To reindex the database test:
$reindexdb test
    To reindex the table foo and the index
    bar in a database named abcd:
$reindexdb --table=foo --index=bar abcd