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https://dev.mysql.com/doc/refman/8.0/en/postinstallation.html
This section discusses tasks that you should perform after installing MySQL: If necessary, initialize the data directory and create the MySQL grant tables. For some MySQL installation methods, data directory initialization may be done for you ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-object-filtering.html
The ENABLED column indicates whether matching objects are monitored, and TIMED indicates whether to collect timing information. Setting the TIMED column affects Performance Schema table contents as described in Section 29.4.1, “Performance Schema ... The setup_objects table controls whether the Performance Schema monitors particular table and stored program ...
https://dev.mysql.com/doc/refman/8.0/en/flush.html
If the --skip-grant-tables option was specified at server startup to disable the MySQL privilege system, FLUSH PRIVILEGES provides a way to enable the privilege system at runtime. The mysqladmin utility provides a command-line interface to some ...| ...
https://dev.mysql.com/doc/refman/8.0/en/validate-password-installation.html
Note If you install MySQL 8.0 using the MySQL Yum repository, MySQL SLES Repository, or RPM packages provided by Oracle, the validate_password component is enabled by default after you start your MySQL Server for the first time. For general ... This ...
https://dev.mysql.com/doc/refman/8.0/en/what-is-crashing.html
If you have examined all other possibilities and concluded that the MySQL server or a MySQL client is causing the problem, it is time to create a bug report, see Section 1.5, “How to Report Bugs or Problems”. Other programs that are not related ...This can normally be checked by pressing the Caps Lock ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-responses-failure-expel.html
You can use the group_replication_member_expel_timeout system variable, which is available from MySQL 8.0.13, to allow additional time between the creation of a suspicion and the expulsion of the suspect member. This is also the behavior of a group ...A group member is then expelled when another member's suspicion of it (or its own suspicion of itself) times ...A suspicion is created when ...
https://dev.mysql.com/doc/refman/8.0/en/alter-instance.html
ALTER INSTANCE instance_action instance_action: { | {ENABLE|DISABLE} INNODB REDO_LOG | ROTATE INNODB MASTER KEY | ROTATE BINLOG MASTER KEY | RELOAD TLS [FOR CHANNEL {mysql_main | mysql_admin}] [NO ROLLBACK ON ERROR] | RELOAD KEYRING } ALTER ...The ...
https://dev.mysql.com/doc/refman/8.0/en/arithmetic-functions.html
For example, to add date values, use DATE_ADD(); see Section 14.7, “Date and Time Functions”. + Addition: mysql> SELECT 3+5; -> 8 - Subtraction: mysql> SELECT 3-5; -> -2 - Unary minus. mysql> SELECT - 2; -> -2 Note If this operator is used with ... Table 14.9 Arithmetic Operators Name Description %, MOD Modulo operator * Multiplication operator + Addition operator - Minus operator - Change the sign of the argument / Division operator DIV Integer division The usual arithmetic operators are ...
https://dev.mysql.com/doc/refman/8.0/en/handler-scope.html
A specific handler is for a MySQL error code, SQLSTATE value, or condition name. For example, there might be a specific MySQL error code handler in an outer block, and a general SQLWARNING handler in an inner block. Or there might be handlers for a ... A stored program may include handlers to be invoked when certain conditions occur within the ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-doublewrite-buffer.html
If there is an operating system, storage subsystem, or unexpected mysqld process exit in the middle of a page write, InnoDB can find a good copy of the page from the doublewrite buffer during crash recovery. Prior to MySQL 8.0.20, the doublewrite ...