Rechercher dans le manuel MySQL

27.4.3.21 The metrics View

This view summarizes MySQL server metrics to show variable names, values, types, and whether they are enabled. By default, rows are sorted by variable type and name.

The metrics view includes this information:

  • Global status variables from the Performance Schema global_status table

  • InnoDB metrics from the INFORMATION_SCHEMA INNODB_METRICS table

  • Current and total memory allocation, based on the Performance Schema memory instrumentation

  • The current time (human readable and Unix timestamp formats)

There is some duplication of information between the global_status and INNODB_METRICS tables, which the metrics view eliminates.

The metrics view has these columns:

  • Variable_name

    The metric name. The metric type determines the source from which the name is taken:

    • For global status variables: The VARIABLE_NAME column of the global_status table

    • For InnoDB metrics: The NAME column of the INNODB_METRICS table

    • For other metrics: A view-provided descriptive string

  • Variable_value

    The metric value. The metric type determines the source from which the value is taken:

  • Type

    The metric type:

    • For global status variables: Global Status

    • For InnoDB metrics: InnoDB Metrics - %, where % is replaced by the value of the SUBSYSTEM column of the INNODB_METRICS table

    • For memory metrics: Performance Schema

    • For the current time: System Time

  • Enabled

    Whether the metric is enabled:

    • For global status variables: YES

    • For InnoDB metrics: YES if the STATUS column of the INNODB_METRICS table is enabled, NO otherwise

    • For memory metrics: NO, YES, or PARTIAL (currently, PARTIAL occurs only for memory metrics and indicates that not all memory/% instruments are enabled; Performance Schema memory instruments are always enabled)

    • For the current time: YES


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-metrics.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