_timer_wait) / NULLIF(SUM(COUNT_STAR), 0), 0)) AS avg_latency, sys.format_time(MAX(max_timer_wait)) AS max_latency FROM performance_schema.events_waits_summary_global_by_event_name WHERE sum_timer_wait > 0 AND event_name != 'idle' GROUP BY SUBSTRING_INDEX(event_name,'/', 3)  ORDER BY SUM(sum_timer_wait) DESC;