#### 28.4.3.41 The user\_summary and x$user\_summary Views

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 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`](sys-user-summary.html) and [`x$user_summary`](sys-user-summary.html) 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.

