26.4.3.41 The user_summary and x$user_summary Views

These views summarize statement activity, file I/O, and connections, grouped by user. By default, rows are sorted by descending total latency.

The user_summary and x$user_summary 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.

• statements

  The total number of statements for the user.

• statement_latency

  The total wait time of timed statements for the user.

• statement_avg_latency

  The average wait time per timed statement for the user.

• table_scans

  The total number of table scans for the user.

• file_ios

  The total number of file I/O events for the user.

• file_io_latency

  The total wait time of timed file I/O events for the user.

• current_connections

  The current number of connections for the user.

• total_connections

  The total number of connections for the user.

• unique_hosts

  The number of distinct hosts from which connections for the user have originated.

• current_memory

  The current amount of allocated memory for the user.

• total_memory_allocated

  The total amount of allocated memory for the user.