vacuumlo [option...] dbname...
Remove no more than limit large objects per transaction (default 1000). Since the server acquires a lock per LO removed, removing too many LOs in one transaction risks exceeding max_locks_per_transaction. Set the limit to zero if you want all removals done in a single transaction.-n
Don't remove anything, just show what would be done.-v
Write a lot of progress messages.-V
Print the vacuumlo version and exit.-?
Show help about vacuumlo command line arguments, and exit.vacuumlo also accepts the following command-line arguments for connection parameters: -h hostname
Database server's host.-p port
Database server's port.-U username
User name to connect as.-w
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
Force vacuumlo to prompt for a password before connecting to a database. This option is never essential, since vacuumlo will automatically prompt for a password if the server demands password authentication. However, vacuumlo 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.