Log
    Log=file-name
    Nolog

    Specifies how the values calculated for the statistics are to
    be logged. Specify the Log qualifier to have the information
    displayed to SYS$OUTPUT. Specify the Log=file-spec qualifier
    to have the information written to a file. Specify the Nolog
    qualifier to prevent display of the information. If you do not
    specify any of variation of the Log qualifier, the default is
    the current setting of the DCL verify switch. (The DCL SET VERIFY
    command controls the DCL verify switch.)