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https://dev.mysql.com/doc/refman/5.7/en/innodb-online-ddl-performance.html
Transactions started before or during the DDL operation can hold metadata locks on the table being altered. Session 2: mysql> ALTER TABLE t1 ADD COLUMN x INT, ALGORITHM=INPLACE, LOCK=NONE; The online DDL operation in session 2, which requires an ...
https://dev.mysql.com/doc/refman/5.7/en/partitioning-columns-range.html
However, the order of the column names in the partitioning column list and the value lists does not have to be the same as the order of the table column definitions in the main part of the CREATE TABLE statement. As with table partitioned by RANGE, ... Range columns partitioning is similar to range partitioning, but enables you to define partitions using ranges based on multiple column ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-event-tables.html
In addition, when events end, the Performance Schema can store them in history tables. For each event type, the Performance Schema uses three tables for storing current and historical events. The tables have names of the following forms, where xxx ... For wait, stage, statement, and transaction events, the Performance Schema can monitor and store current ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-variable-table-migration.html
The INFORMATION_SCHEMA has tables that contain system and status variable information (see Section 24.3.11, “The INFORMATION_SCHEMA GLOBAL_VARIABLES and SESSION_VARIABLES Tables”, and Section 24.3.10, “The INFORMATION_SCHEMA GLOBAL_STATUS and ...Applications should run as is, with no code changes, and should see the same variable names and values as in MySQL ...
https://dev.mysql.com/doc/refman/5.7/en/replication-rules-table-options.html
The replica checks for and evaluates table options only if either of the following two conditions is true: No matching database options were found. When viewed in terms of events, the process of checking table options is the same for both row-based ...One or more database options were found, and were evaluated to arrive at an “execute” condition according to the rules described in the previous section (see Section 16.2.5.1, “Evaluation of Database-Level Replication and Binary Logging ...
https://dev.mysql.com/doc/refman/5.7/en/load-data.html
In some extreme cases, you can create the indexes even faster by turning them off with ALTER TABLE ... DISABLE KEYS before loading the file into the table and re-creating the indexes with ALTER TABLE ... INTO Statement”.) To write data from a ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-innodb-temp-table-info-table.html
The INNODB_TEMP_TABLE_INFO table provides information about user-created InnoDB temporary tables that are active in an InnoDB instance. It does not provide information about internal InnoDB temporary tables used by the optimizer. The ...The number ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-analyze-table-complexity.html
To set the number of pages sampled for an individual table, use the STATS_SAMPLE_PAGES option with CREATE TABLE or ALTER TABLE. ANALYZE TABLE complexity for InnoDB tables is dependent on: The number of pages sampled, as defined by ...Note ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-install-example-data.html
To specify this, use the ENGINE=NDBCLUSTER or ENGINE=NDB option when creating the table: CREATE TABLE tbl_name (col_name column_definitions) ENGINE=NDBCLUSTER; Alternatively, for an existing table that uses a different storage engine, use ALTER ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-auto-increment-handling.html
A server restart also cancels the effect of the AUTO_INCREMENT = N table option in CREATE TABLE and ALTER TABLE statements, which you can use with InnoDB tables to set the initial counter value or alter the current counter value. InnoDB provides a ...The index is not required to be a PRIMARY KEY or UNIQUE, but to avoid duplicate values in the AUTO_INCREMENT column, those index types are ...