• event_class 

The event class. 

• total 

The total number of occurrences of events in the class. 

• total_latency 

The total wait time of timed occurrences of events in the class. 

• min_latency 

The minimum single wait time of timed occurrences of events in the class. 

• avg_latency 

The average wait time per timed occurrence of events in the class. 

• max_latency 

The maximum single wait time of timed occurrences of events in the class. 

## 28.4.3.50 The waits_by_host_by_latency and x$waits_by_host_by_latency Views 

These views summarize wait events, grouped by host and event. By default, rows are sorted by host and descending total latency. Idle events are ignored. 

The waits_by_host_by_latency  and x$waits_by_host_by_latency  views have these columns: 

• host 

The host from which the connection originated. 

• event 

The event name. 

• total 

The total number of occurrences of the event for the host. 

• total_latency 

The total wait time of timed occurrences of the event for the host. 

• avg_latency 

The average wait time per timed occurrence of the event for the host. 

• max_latency 

The maximum single wait time of timed occurrences of the event for the host. 

## 28.4.3.51 The waits_by_user_by_latency and x$waits_by_user_by_latency Views 

These views summarize wait events, grouped by user and event. By default, rows are sorted by user and descending total latency. Idle events are ignored. 

