26.4.3.5 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:
-
hostThe host from which the client connected. Rows for which the
HOSTcolumn in the underlying Performance Schema table isNULLare assumed to be for background threads and are reported with a host name ofbackground. -
totalThe total number of statements for the host.
-
total_latencyThe total wait time of timed statements for the host.
-
max_latencyThe maximum single wait time of timed statements for the host.
-
lock_latencyThe total time waiting for locks by timed statements for the host.
-
rows_sentThe total number of rows returned by statements for the host.
-
rows_examinedThe total number of rows read from storage engines by statements for the host.
-
rows_affectedThe total number of rows affected by statements for the host.
-
full_scansThe total number of full table scans by statements for the host.
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