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MySQL 5.7 Reference Manual  /  ...  /  The host_summary_by_statement_latency and x$host_summary_by_statement_latency Views

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:

  • 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.


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