• host 

The host from which the client connected. Rows for which the HOST  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 host. 

• total_latency 

The total wait time of timed statements for the host. 

• max_latency 

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

• lock_latency 

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

• rows_sent 

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

• rows_examined 

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

• rows_affected 

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

• full_scans 

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

## 28.4.3.6 The host_summary_by_statement_type and x$host_summary_by_statement_type Views 

These views summarize informaion about statements executed, grouped by host and statement type. By default, rows are sorted by host and descending total latency. 

The host_summary_by_statement_type  and x$host_summary_by_statement_type  views have these columns: 

• host 

The host from which the client connected. Rows for which the HOST  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 

