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https://dev.mysql.com/doc/refman/8.0/en/group-replication-compatibility-communication.html
To check the group's communication protocol version, issue the following statement on any member: SELECT group_replication_get_communication_protocol(); The return value shows the oldest MySQL Server version that can join this group and use the ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-fault-tolerance.html
As such, it requires a majority of servers to be active to reach quorum and thus make a decision. This has direct impact on the number of failures the system can tolerate without compromising itself and its overall functionality. As such if one ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-launching.html
Make sure the user is present in the server and that mysql_upgrade was ran after a server update. If you used plugin_load_add='group_replication.so' in the option file then the Group Replication plugin is already installed, and you can proceed to ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-monitoring.html
These Performance Schema replication tables also show information relating to Group Replication: replication_connection_status shows information regarding Group Replication, such as transactions received from the group and queued in the applier ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-offline-upgrade.html
To perform an offline upgrade of a Group Replication group, you remove each member from the group, perform an upgrade of the member and then restart the group as usual. In a single-primary group, shutdown each secondary first and then finally the ...In a multi-primary group you can shutdown the members in any ...
https://dev.mysql.com/doc/refman/8.0/en/index-page-merge-threshold.html
If the “page-full” percentage for an index page falls below the MERGE_THRESHOLD value when a row is deleted or when a row is shortened by an UPDATE operation, InnoDB attempts to merge the index page with a neighboring index page. The minimum ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-datafiles-table.html
The INNODB_DATAFILES table provides data file path information for InnoDB file-per-table and general tablespaces. For related usage information and examples, see Section 17.15.3, “InnoDB INFORMATION_SCHEMA Schema Object Tables”. Note The ...If ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-ft-being-deleted-table.html
When OPTIMIZE TABLE is run, the INNODB_FT_BEING_DELETED table is emptied, and DOC_ID values are removed from the INNODB_FT_DELETED table. Because the contents of INNODB_FT_BEING_DELETED typically have a short lifetime, this table has limited utility ... The INNODB_FT_BEING_DELETED table provides a snapshot of the INNODB_FT_DELETED table; it is used only during an OPTIMIZE TABLE maintenance ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-ft-default-stopword-table.html
For information about the default InnoDB stopword list and how to define your own stopword lists, see Section 14.9.4, “Full-Text Stopwords”. For related usage information and examples, see Section 17.15.4, “InnoDB INFORMATION_SCHEMA FULLTEXT ... The INNODB_FT_DEFAULT_STOPWORD table holds a list of stopwords that are used by default when creating a FULLTEXT index on InnoDB ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-ft-deleted-table.html
For related usage information and examples, see Section 17.15.4, “InnoDB INFORMATION_SCHEMA FULLTEXT Index Tables”. Use the INFORMATION_SCHEMA COLUMNS table or the SHOW COLUMNS statement to view additional information about the columns of this ... The INNODB_FT_DELETED table stores rows that are deleted from the FULLTEXT index for an InnoDB ...