No cache version.

Caching disabled. Default setting for this page:enabled (code DEF204)
If the display is too slow, you can disable the user mode to view the cached version.

Rechercher dans le manuel MySQL

27.4.3.48 The wait_classes_global_by_avg_latency and x$wait_classes_global_by_avg_latency Views

These views summarize wait class average latencies, grouped by event class. By default, rows are sorted by descending average latency. Idle events are ignored.

An event class is determined by stripping from the event name everything after the first three components. For example, the class for wait/io/file/sql/slow_log is wait/io/file.

The wait_classes_global_by_avg_latency and x$wait_classes_global_by_avg_latency views have these columns:

  • event_class

    The event class.

  • total

    The total number of occurrences of events in the class.

  • total_latency

    The total wait time of timed occurrences of events in the class.

  • min_latency

    The minimum single wait time of timed occurrences of events in the class.

  • avg_latency

    The average wait time per timed occurrence of events in the class.

  • max_latency

    The maximum single wait time of timed occurrences of events in the class.


Find a PHP function

Document created the 26/06/2006, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/mysql-rf-sys-wait-classes-global-by-avg-latency.html

The infobrol is a personal site whose content is my sole responsibility. The text is available under CreativeCommons license (BY-NC-SA). More info on the terms of use and the author.

References

  1. View the html document Language of the document:en Manuel MySQL : https://dev.mysql.com/

These references and links indicate documents consulted during the writing of this page, or which may provide additional information, but the authors of these sources can not be held responsible for the content of this page.
The author This site is solely responsible for the way in which the various concepts, and the freedoms that are taken with the reference works, are presented here. Remember that you must cross multiple source information to reduce the risk of errors.

Contents Haut