30.4.3.5 The host_summary_by_statement_latency and x$host_summary_by_statement_latency Views

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

The host_summary_by_statement_latency and x$host_summary_by_statement_latency 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.

• 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.

• cpu_latency

  The time spent on CPU for the current thread.

• 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.