30.4.3.44 The user_summary_by_stages and x$user_summary_by_stages Views

These views summarize stages, grouped by user. By default, rows are sorted by user and descending total stage latency.

The user_summary_by_stages and x$user_summary_by_stages views have these columns:

• user

  The client user name. Rows for which the USER column in the underlying Performance Schema table is NULL are assumed to be for background threads and are reported with a host name of background.

• event_name

  The stage event name.

• total

  The total number of occurrences of the stage event for the user.

• total_latency

  The total wait time of timed occurrences of the stage event for the user.

• avg_latency

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