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
Search Results
https://dev.mysql.com/replication-options-gtids.html
--gtid-executed-compression-period Property Value Command-Line Format --gtid-executed-compression-period=# Type Integer Default Value 1000 Minimum Value 0 Maximum Value 4294967295 Compress the mysql.gtid_executed table each time this many ...
https://dev.mysql.com/sys-io-by-thread-by-latency.html
These views summarize I/O consumers to display time waiting for I/O, grouped by thread. total_latency The total wait time of timed I/O events for the thread. min_latency The minimum single wait time of timed I/O events for the thread. avg_latency ...The io_by_thread_by_latency and x$io_by_thread_by_latency views have these columns: user For foreground threads, the account associated with the ...
https://dev.mysql.com/sys-io-global-by-file-by-latency.html
These views summarize global I/O consumers to display time waiting for I/O, grouped by file. total_latency The total wait time of timed I/O events for the file. read_latency The total wait time of timed read I/O events for the file. write_latency ...The io_global_by_file_by_latency and x$io_global_by_file_by_latency views have these columns: file The file path ...
https://dev.mysql.com/sys-io-global-by-wait-by-bytes.html
These views summarize global I/O consumers to display amount of I/O and time waiting for I/O, grouped by event. total_latency The total wait time of timed occurrences of the I/O event. min_latency The minimum single wait time of timed occurrences ...By default, rows are sorted by descending total I/O (bytes read and ...
https://dev.mysql.com/sys-statements-with-full-table-scans.html
By default, rows are sorted by descending percentage of time a full scan was done and descending total latency. total_latency The total wait time of timed statement events for the statement. no_index_used_count The total number of times no index was ... These views display normalized statements that have done full table ...
https://dev.mysql.com/sys-statements-with-runtimes-in-95th-percentile.html
These views list statements with runtimes in the 95th percentile. The statements_with_runtimes_in_95th_percentile and x$statements_with_runtimes_in_95th_percentile views have these columns: query The normalized statement string. total_latency The ...db The default database for the statement, or NULL if there is ...
https://dev.mysql.com/upgrading-what-is-upgraded.html
One way that FORCE differs from AUTO is that with FORCE, the server re-creates system tables such as help tables or time zone tables if they are missing. Check and repair operations can be time-consuming, particularly for large tables. This ensures ... Installing a new version of MySQL may require upgrading these parts of the existing installation: The mysql system schema, which contains tables that store information required by the MySQL server as it runs (see Section 5.3, “The mysql System ...
https://dev.mysql.com/window-functions-frames.html
(For details about the permitted units specifiers, see the description of the DATE_ADD() function in Section 12.7, “Date and Time Functions”.) RANGE on a numeric or temporal expr requires ORDER BY on a numeric or temporal expression, ... The ...
https://dev.mysql.com/added-deprecated-removed.html
This section lists server variables, status variables, and options that were added for the first time, have been deprecated, or have been removed in MySQL 8.0. binlog_transaction_dependency_tracking: Source of dependency information (commit ...
https://dev.mysql.com/faqs-stored-procs.html
Do the preceding limitations affect the ability of MySQL to do point-in-time recovery? A.4.28. If replication or binary logging in general (for the purpose of point-in-time recovery) is active, then MySQL DBAs have two security options open to them: ...Where can I find documentation for MySQL stored procedures and stored functions? ...
Document created the 26/06/2006, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/mysql-rf-fct-time-p-9.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
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.
