26.4.3.45 The user_summary_by_statement_latency and x$user_summary_by_statement_latency Views

These views summarize overall statement statistics, grouped by user. By default, rows are sorted by descending total latency.

The user_summary_by_statement_latency and x$user_summary_by_statement_latency 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.

• total

  The total number of statements for the user.

• total_latency

  The total wait time of timed statements for the user.

• max_latency

  The maximum single wait time of timed statements for the user.

• lock_latency

  The total time waiting for locks by timed statements for the user.

• rows_sent

  The total number of rows returned by statements for the user.

• rows_examined

  The total number of rows read from storage engines by statements for the user.

• rows_affected

  The total number of rows affected by statements for the user.

• full_scans

  The total number of full table scans by statements for the user.