26.4.3.14 The io_global_by_wait_by_latency and x$io_global_by_wait_by_latency Views

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 latency.

The io_global_by_wait_by_latency and x$io_global_by_wait_by_latency views have these columns:

event_name

The I/O event name, with the wait/io/file/ prefix stripped.
total

The total number of occurrences of the I/O event.
total_latency

The total wait time of timed occurrences of the I/O event.
avg_latency

The average wait time per timed occurrence of the I/O event.
max_latency

The maximum single wait time of timed occurrences of the I/O event.
read_latency

The total wait time of timed read occurrences of the I/O event.
write_latency

The total wait time of timed write occurrences of the I/O event.
misc_latency

The total wait time of timed other occurrences of the I/O event.
count_read

The number of read requests for the I/O event.
total_read

The number of bytes read for the I/O event.
avg_read

The average number of bytes per read for the I/O event.
count_write

The number of write requests for the I/O event.
total_written

The number of bytes written for the I/O event.
avg_written

The average number of bytes per write for the I/O event.