1  –  data_read_request_field

    The number of requests issued to the PIO subsystem to read data
    pages asynchronously.

2  –  data read IO field

    The number of asynchronous read I/O operations done by the PIO
    subsystem to get data pages from the disk.

3  –  spam_read_request_field

    The number of requests issued to the PIO subsystem to read SPAM
    pages asynchronously.

4  –  spam read IO field

    The number of asynchronous read I/O operations done by the PIO
    subsystem to get SPAM pages from the disk.

5  –  read_stall_count_field

    The total number of times the PIO subsystem had to wait for the
    completion of asynchronous read I/O operations.

6  –  read_stall_time_field

    The total time (in hundredths of a second) spent waiting for
    asynchronous read requests to complete. A high number means the
    number of buffers being prefetched is too low. You can specify
    that more buffers be prefetched by specifying a higher value with
    the RDM$BIND_APF_DEPTH logical name.

7  –  write IO field

    The number of asynchronous writes done by the PIO subsystem to
    write data and SPAM pages to the disk.

8  –  write_stall_count_field

    The total number of times the PIO subsystem had to wait for the
    completion of asynchronous write I/O.

9  –  write_stall_time_field

    The total time (in hundredths of a second) spent waiting for
    asynchronous write requests to complete. An excessively high
    number often indicates that the number of clean buffers being
    maintained at the end of a process's least recently used queue of
    buffers for replacement is too low. You can increase the number
    of clean buffers being maintained at the end of a process's least
    recently used queue of buffers for replacement by specifying a
    higher value with the RDM$BIND_CLEAN_BUF_CNT logical name.