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.