sys Schema Views The  version  view has these columns: The  sys  schema version. The MySQL server version. These views summarize wait class average latencies, grouped by event class. By default, rows are sorted by descending average latency. Idle events are ignored. An event class is determined by stripping from the event name everything after the first three components. For example, the class for  wait/io/file/sql/slow_log  is  wait/io/file . The  wait_classes_global_by_avg_latency  and  x$wait_classes_global_by_avg_latency views have these columns: The event class. The total number of occurrences of events in the class. The total wait time of timed occurrences of events in the class. The minimum single wait time of timed occurrences of events in the class. The average wait time per timed occurrence of events in the class. The maximum single wait time of timed occurrences of events in the class. These views summarize wait class total latencies, grouped by event class. By default, rows are sorted by descending total latency. Idle events are ignored. An event class is determined by stripping from the event name everything after the first three components. For example, the class for  wait/io/file/sql/slow_log  is  wait/io/file . The  wait_classes_global_by_latency  and  x$wait_classes_global_by_latency  views have these columns: • sys_version • mysql_version 28.4.3.48 The wait_classes_global_by_avg_latency and x $wait_classes_global_by_avg_latency Views • event_class • total • total_latency • min_latency • avg_latency • max_latency 28.4.3.49 The wait_classes_global_by_latency and x$wait_classes_global_by_latency Views 5180