MySQL 5.7 Reference Manual Including MySQL NDB Cluster 7.5 and NDB Cluster 7.6
These views summarize informaion about statements executed, grouped by user and statement type. By default, rows are sorted by user and descending total latency.
The
user_summary_by_statement_type
and
x$user_summary_by_statement_type
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.
statement
The final component of the statement event name.
total
The total number of occurrences of the statement event for the user.
total_latency
The total wait time of timed occurrences of the statement event for the user.
max_latency
The maximum single wait time of timed occurrences of the statement event for the user.
lock_latency
The total time waiting for locks by timed occurrences of the statement event for the user.
rows_sent
The total number of rows returned by occurrences of the statement event for the user.
rows_examined
The total number of rows read from storage engines by occurrences of the statement event for the user.
rows_affected
The total number of rows affected by occurrences of the statement event for the user.
full_scans
The total number of full table scans by occurrences of the statement event for the user.