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

27.4.4.14 The ps_setup_save() Procedure

Contents

Saves the current Performance Schema configuration. This enables you to alter the configuration temporarily for debugging or other purposes, then restore it to the previous state by invoking the ps_setup_reload_saved() procedure.

To prevent other simultaneous calls to save the configuration, ps_setup_save() acquires an advisory lock named sys.ps_setup_save by calling the GET_LOCK() function. ps_setup_save() takes a timeout parameter to indicate how many seconds to wait if the lock already exists (which indicates that some other session has a saved configuration outstanding). If the timeout expires without obtaining the lock, ps_setup_save() fails.

It is intended you call ps_setup_reload_saved() later within the same session as ps_setup_save() because the configuration is saved in TEMPORARY tables. ps_setup_save() drops the temporary tables and releases the lock. If you end your session without invoking ps_setup_save(), the tables and lock disappear automatically.

This procedure disables binary logging during its execution by manipulating the session value of the sql_log_bin system variable. That is a restricted operation, so the procedure requires privileges sufficient to set restricted session variables. See Section 5.1.9.1, “System Variable Privileges”.

Parameters

  • in_timeout INT: How many seconds to wait to obtain the sys.ps_setup_save lock. A negative timeout value means infinite timeout.

Contents Haut

Example
  1. mysql> CALL sys.ps_setup_save(10);
  2.  
  3. ... make Performance Schema configuration changes ...
  4.  
  5. mysql> CALL sys.ps_setup_reload_saved();

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-ps-setup-save.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