verbosity

Controls the level of diagnostic output produced.

This option can be used to increase the amount of diagnostic output which is produced. The diagnostic output produced will be to the standard error device (so as not to interfere with any output to the standard output device). Typically this option is only specified if the process is running in the foreground. Values range from [-1,9], where 0 or less turns off verbose output (the default) and larger values will produce more diagnostic output. '> true'> false'>