sys Schema Views • count_write • write_latency • count_misc • misc_latency • event_name • total • total_latency • min_latency • avg_latency • max_latency • count_read • total_read • avg_read 5151 The average number of bytes per read for the I/O event. The number of bytes read for the I/O event. The number of read requests for the I/O event. The maximum single wait time of timed occurrences of the I/O event. The average wait time per timed occurrence of the I/O event. The minimum single wait time of timed occurrences of the I/O event. The total wait time of timed occurrences of the I/O event. The total number of occurrences of the I/O event. The I/O event name, with the  wait/io/file/  prefix stripped. The  io_global_by_wait_by_bytes  and  x$io_global_by_wait_by_bytes  views have these columns: These views summarize global I/O consumers to display amount of I/O and time waiting for I/O, grouped by event. By default, rows are sorted by descending total I/O (bytes read and written). The total wait time of timed other I/O events for the file. 28.4.3.13 The io_global_by_wait_by_bytes and x$io_global_by_wait_by_bytes Views The total number of write I/O events for the file. The total wait time of timed write I/O events for the file. The total number of other I/O events for the file.