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https://dev.mysql.com/doc/refman/9.7/en/group-replication-multi-primary-mode.html
In multi-primary mode (group_replication_single_primary_mode=OFF) no member has a special role. Any member that is compatible with the other group members is set to read/write mode when joining the group, and can process write transactions, even if ...
https://dev.mysql.com/doc/refman/9.7/en/group-replication-system-variables.html
This section lists the system variables that are specific to the Group Replication plugin. The name of each Group Replication system variable is prefixed with group_replication_. Note InnoDB Cluster uses Group Replication, but the default values of ...
https://dev.mysql.com/doc/refman/9.7/en/import-table.html
The IMPORT TABLE statement imports MyISAM tables based on information contained in .sdi (serialized dictionary information) metadata files. IMPORT TABLE requires the FILE privilege to read the .sdi and table content files, and the CREATE privilege ...
https://dev.mysql.com/doc/refman/9.7/en/innodb-deadlock-example.html
The following example illustrates how an error can occur when a lock request causes a deadlock. Client A enables innodb_print_all_deadlocks, creates two tables, 'Animals' and 'Birds', and inserts data into each. Thererfore, the previous read-only ...
https://dev.mysql.com/doc/refman/9.7/en/innodb-disabling-tablespace-path-validation.html
At startup, InnoDB scans directories defined by the innodb_directories variable for tablespace files. The paths of discovered tablespace files are validated against the paths recorded in the data dictionary. If the paths do not match, the paths in ...
https://dev.mysql.com/doc/refman/9.7/en/innodb-file-per-table-tablespaces.html
A file-per-table tablespace contains data and indexes for a single InnoDB table, and is stored on the file system in a single data file. File-per-table tablespace characteristics are described under the following topics in this section: ...
https://dev.mysql.com/doc/refman/9.7/en/innodb-index-types.html
Each InnoDB table has a special index called the clustered index that stores row data. To get the best performance from queries, inserts, and other database operations, it is important to understand how InnoDB uses the clustered index to optimize ...
https://dev.mysql.com/doc/refman/9.7/en/innodb-online-ddl-performance.html
Online DDL improves several aspects of MySQL operation: Applications that access the table are more responsive because queries and DML operations on the table can proceed while the DDL operation is in progress. Reduced locking and waiting for MySQL ...
https://dev.mysql.com/doc/refman/9.7/en/innodb-page-compression.html
InnoDB supports page-level compression for tables that reside in file-per-table tablespaces. Page compression is enabled by specifying the COMPRESSION attribute with CREATE TABLE or ALTER TABLE. Supported Platforms Page compression requires sparse ...
https://dev.mysql.com/doc/refman/9.7/en/innodb-performance-optimizer-statistics.html
This section describes how to configure persistent and non-persistent optimizer statistics for InnoDB tables. Persistent optimizer statistics are persisted across server restarts, allowing for greater plan stability and more consistent query ...