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https://dev.mysql.com/doc/refman/8.4/en/innodb-online-ddl-space-requirements.html
Temporary log files: A temporary log file records concurrent DML when an online DDL operation creates an index or alters a table. If the operation takes a long time and concurrent DML modifies the table so much that the size of the temporary log ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-tablespace-autoextend-size.html
By default, when a file-per-table or general tablespace requires additional space, the tablespace is extended incrementally according to the following rules: If the tablespace is less than an extent in size, it is extended one page at a time. If ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-troubleshooting-datadict.html
Information about table definitions is stored in the InnoDB data dictionary. Cannot Open Datafile With innodb_file_per_table enabled (the default), the following messages may appear at startup if a file-per-table tablespace file (.ibd file) is ...
https://dev.mysql.com/doc/refman/8.4/en/password-management.html
Internal Versus External Credentials Storage Password Expiration Policy Password Reuse Policy Password Verification-Required Policy Dual Password Support Random Password Generation Failed-Login Tracking and Temporary Account Locking Important MySQL ... MySQL supports these password-management capabilities: Password expiration, to require passwords to be changed ...
https://dev.mysql.com/doc/refman/8.4/en/replication-snapshot-method.html
If your database is stored in binary portable files, you can copy the raw data files to a replica. Choose one of these options: Exclude all the tables in the database using --ignore-table option. Check the description for mysqldump's ... If the ...
https://dev.mysql.com/doc/refman/8.4/en/show-columns.html
SHOW [EXTENDED] [FULL] {COLUMNS | FIELDS} {FROM | IN} tbl_name [{FROM | IN} db_name] [LIKE 'pattern' | WHERE expr] SHOW COLUMNS displays information about the columns in a given table. These two statements are equivalent: SHOW COLUMNS FROM mytable ...SHOW COLUMNS displays information only for those columns for which you have some ...
https://dev.mysql.com/doc/refman/8.4/en/show-engine.html
Note InnoDB mutexes and rwlocks can also be monitored using Performance Schema tables. Interpret buffer names as follows: An internal buffer that is not exposed as a table is named within parentheses. An internal buffer that is exposed as a table in ... SHOW ENGINE engine_name {STATUS | MUTEX} SHOW ENGINE displays operational information about a storage ...
https://dev.mysql.com/doc/mysql-ai/9.4/en/mys-mysqlai-ml-predict-row.html
A table can include extra columns, and still use the MySQL HeatWave AutoML model. This allows side by side comparisons of target column labels, ground truth, and predictions in the same table. The column names must match the feature column names in ... ML_PREDICT_ROW generates predictions for one or more rows of unlabeled data specified in JSON ...
https://dev.mysql.com/doc/mysqld-version-reference/en/options-variables.html
The following table shows all the options and variables available in MySQL Server. Dyn: Whether the item is dynamically settable while the server is running. An item has a row in the table if it ever existed in any series shown in the table. Intr: ...
https://dev.mysql.com/doc/refman/8.4/en/function-optimization.html
If a function is tagged nondeterministic, a reference to it in a WHERE clause is evaluated for every row (when selecting from one table) or combination of rows (when selecting from a multiple-table join). MySQL also determines when to evaluate ...A ...