I/O analysis requires that I/O data be gathered. Use the SET IO_
    SERVICES command in the Collector to gather I/O data.

    The PLOT and TABULATE commands accept several datakind
    qualifiers:

    /IO_SERVICES           Tallies I/O system service call counts
    /READ_COUNT            Tallies physical read counts
    /WRITE_COUNT           Tallies physical write counts
    /PHYSICAL_IO_COUNT     Tallies total physical I/O counts

    The PLOT and TABULATE commands accept several nodespecs:

    FILE_KEY BY [n] KEY
    FILE_NAME BY FILE
    FILE_VBN BY [n] BLOCKS

    IO_SYSTEM_SERVICE BY IO_SERVICE
    IO_SERVICE io-service-name

    PHYSICAL_IO_COUNT BY [n] COUNTS
    READ_COUNT BY [n] COUNTS
    RECORD_SIZE BY [n] BYTES
    WRITE_COUNT BY [n] COUNTS

    The SET FILTER command accepts several filter specs.:

    FILE_KEY=n:[m]
    FILE_NAME=file-specification
    FILE_VBN=n:[m]

    IO_SERVICE=io-service-name

    PHYSICAL_IO_COUNT=n:[m]
    READ_COUNT=n:[m]
    RECORD_SIZE=n:[m]
    WRITE_COUNT=n:[m]