MySQL 5.7 Reference Manual Including MySQL NDB Cluster 7.5 and NDB Cluster 7.6
These views summarize wait events, grouped by event. By default, rows are sorted by descending total latency. Idle events are ignored.
The waits_global_by_latency and
x$waits_global_by_latency views
have these columns:
events
The event name.
total
The total number of occurrences of the event.
total_latency
The total wait time of timed occurrences of the event.
avg_latency
The average wait time per timed occurrence of the event.
max_latency
The maximum single wait time of timed occurrences of the event.