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https://dev.mysql.com/doc/refman/8.0/en/system-schema.html
Time Zone System Tables These system tables contain time zone information: time_zone: Time zone IDs and whether they use leap seconds. A broad categorization is that the mysql schema contains data dictionary tables that store database object ...It ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-undo-tablespaces.html
The I/O patterns for undo logs make undo tablespaces good candidates for SSD storage. Default undo tablespaces are created at initialization time to provide a location for rollback segments that must exist before SQL statements can be accepted. The ... Undo tablespaces contain undo logs, which are collections of records containing information about how to undo the latest change by a transaction to a clustered index ...
https://dev.mysql.com/doc/refman/8.0/en/linux-installation-yum-repo.html
The default password policy implemented by validate_password requires that passwords contain at least one uppercase letter, one lowercase letter, one digit, and one special character, and that the total password length is at least 8 characters. The ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-api-definition.html
(NDB 8.0.13) This parameter (along with RedoOverCommitLimit and RedoOverCommitCounter) controls the data node's handling of operations when too much time is taken flushing redo logs to disk. The [mysqld] and [api] sections in the config.ini file ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-configuring-consistency-guarantees.html
Scenario 7: On the same system as described in Scenario 6, a command that performs analytics needs to be executed daily, using the most up-to-date data. A transaction cannot be on-hold forever, and if the time held exceeds wait_timeout it returns an ... Although the Transaction Synchronization Points section explains that conceptually there are two synchronization points from which you can choose: on read or on write, these terms were a simplification and the terms used in Group Replication are: before and after transaction ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-init-startup-configuration.html
The I/O patterns for undo logs make undo tablespaces good candidates for SSD storage. The default 16KB page size is appropriate for a wide range of workloads, particularly for queries involving table scans and DML operations involving bulk updates.
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-disk-data-objects.html
Once table ts_1 has been created as shown, you can perform INSERT, SELECT, UPDATE, and DELETE statements on it just as you would with any other MySQL table. A tablespace contains one or more data files and one or more undo log file groups. Undo log ... NDB Cluster Disk Data storage is implemented using the following objects: Tablespace: Acts as containers for other Disk Data ...
https://dev.mysql.com/doc/refman/8.0/en/upgrade-binary-package.html
It also brings the Performance Schema, INFORMATION_SCHEMA, and sys databases up to date for MySQL 8.0, and examines all user databases for incompatibilities with the current version of MySQL. It also brings the Performance Schema, ... This section ...For details about what may need upgrading, see Section 3.4, “What the MySQL Upgrade Process ...
https://dev.mysql.com/doc/refman/8.0/en/mysqlshow.html
If no column is given, all matching columns and column types in the table are shown. * and ? characters are converted into SQL % and _ wildcard characters. This is easily fixed by adding an extra % last on the command line as a separate argument.
https://dev.mysql.com/doc/refman/8.0/en/group-replication-configuring-instances.html
log_bin=binlog log_slave_updates=ON binlog_format=ROW master_info_repository=TABLE relay_log_info_repository=TABLE transaction_write_set_extraction=XXHASH64 Group Replication Settings At this point the option file ensures that the server is ...To ...