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https://dev.mysql.com/doc/refman/5.7/en/mysql-enterprise-telemetry.html
It enables users to instrument their applications in order to export observability data: traces, metrics and logs, enabling increased granularity of debugging and testing. The MySQL telemetry component is based on the OpenTelemetry (OTel) project, ...
https://dev.mysql.com/doc/refman/5.7/en/privilege-checking.html
In complex scenarios where the query uses SQL SECURITY DEFINER views or stored routines, it may be that a user is denied from seeing the trace of its query because it lacks some extra privileges on those objects. In that case, the trace will be ...
https://dev.mysql.com/doc/refman/5.7/en/reserved-accounts.html
During data directory initialization, MySQL creates user accounts that should be considered reserved: 'root'@'localhost: Used for administrative purposes. This account is locked so that it cannot be used for client connections. This account is ...
https://dev.mysql.com/doc/refman/5.7/en/show-binary-logs.html
A user with the SUPER or REPLICATION CLIENT privilege may execute this statement. SHOW BINARY LOGS SHOW MASTER LOGS Lists the binary log files on the server. This statement is used as part of the procedure described in Section 13.4.1.1, “PURGE ...
https://dev.mysql.com/doc/refman/5.7/en/spatial-function-argument-handling.html
This provides additional flexibility to users because it is unnecessary to be concerned about the uniqueness of geometry data. SRID 0 is the default for new geometry values if no SRID is specified. Spatial values, or geometries, have the properties ...
https://dev.mysql.com/doc/refman/5.7/en/what-is-crashing.html
(Before doing this, you should try to restart your computer and check all cables to the keyboard.) The mouse pointer does not move. Please examine your system log file (/var/log/messages or similar) for reasons for your problem. Use the “copy and ...This can normally be checked by pressing the Caps Lock ...
https://dev.mysql.com/doc/refman/5.7/en/windows-extract-archive.html
Make sure that you are logged in as a user with administrator privileges. To install MySQL manually, do the following: If you are upgrading from a previous version please refer to Section 2.10.8, “Upgrading MySQL on Windows”, before beginning ...If you do not install MySQL at C:\mysql, you must specify the path to the install directory during startup or in an option ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-change-buffer.html
The purge operation can write disk blocks for a series of index values more efficiently than if each value were written to disk immediately. During this time, disk I/O is increased, which can cause a significant slowdown for disk-bound queries. The ...
https://dev.mysql.com/doc/refman/5.7/en/functions.html
Rather than showing examples in this format: mysql> SELECT MOD(29,9); +-----------+ | mod(29,9) | +-----------+ | 2 | +-----------+ 1 rows in set (0.00 sec) This format is used instead: mysql> SELECT MOD(29,9); -> 2 . Expressions can be used at ...
https://dev.mysql.com/doc/refman/5.7/en/option-modifiers.html
The --maximum prefix is available for mysqld only and permits a limit to be placed on how large client programs can set session system variables. For example, with --maximum-back_log=200, the server produces this error: Maximum value of 'back_log' ...For example, the mysql client supports a --column-names option that determines whether or not to display a row of column names at the beginning of query ...