Specifies whether usage statistics are logged by IMPORT. NOTRACE
    is the default.

    Some actions taken by the IMPORT statement can consume
    significant amounts of I/O, and CPU time. These actions include
    the following operations:

    o  Loading data

    o  Defining indices

    o  Defining constraints

    When you specify the TRACE option with the IMPORT statement, RDO
    writes a message to your terminal screen when each operation
    begins, and writes a summary of DIO, CPU, and PAGE FAULT
    statistics when the operation completes. When the IMPORT
    statement finishes execution, a summary of all DIO, CPU, and
    PAGE FAULT statistics is displayed. The display also includes
    information on access to the RBR file, database creation and
    loading of data.