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https://dev.mysql.com/doc/refman/8.4/en/group-replication-online-upgrade-methods.html
Choose one of the following methods of upgrading a Group Replication group: Rolling In-Group Upgrade This method is supported provided that servers running a newer version are not generating workload to the group while there are still servers with ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-performance-xcom-cache-reduce.html
The minimum setting for the XCom message cache size in MySQL 8.4 is 128 MB, which enables deployment on a host that has a restricted amount of available memory. Having a very low group_replication_message_cache_size setting is not recommended if ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-performance-xcom-cache.html
The group communication engine for Group Replication (XCom, a Paxos variant) includes a cache for messages (and their metadata) exchanged between the group members as a part of the consensus protocol. Among other functions, the message cache is ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-plugin-architecture.html
MySQL Group Replication is a MySQL plugin and it builds on the existing MySQL replication infrastructure, taking advantage of features such as the binary log, row-based logging, and global transaction identifiers. It integrates with current MySQL ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-replication-group-member-stats.html
Each member in a replication group certifies and applies transactions received by the group. Statistics regarding the certifier and applier procedures are useful to understand how the applier queue is growing, how many conflicts have been found, ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-replication-group-members.html
The performance_schema.replication_group_members table is used for monitoring the status of the different server instances that are members of the group. The information in the table is updated whenever there is a view change, for example when the ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-secure-socket-layer-support-ssl.html
Secure sockets can be used for group communication connections between members of a group. The Group Replication system variable group_replication_ssl_mode is used to activate the use of SSL for group communication connections and specify the ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-single-consensus-leader.html
By default, the group communication engine for Group Replication (XCom, a Paxos variant) operates using every member of the replication group as a leader. The group communication engine can use a single leader to drive consensus when the group is ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-single-primary-mode.html
In single-primary mode (group_replication_single_primary_mode=ON) the group has a single primary server that is set to read/write mode. All the other members in the group are set to read-only mode (with super_read_only=ON). All other servers that ...
https://dev.mysql.com/doc/refman/8.4/en/group-replication-view-changes.html
When Group Replication's distributed recovery process is carrying out state transfer from the binary log, to synchronize the joining member with the donor up to a specific point in time, the joining member and donor make use of GTIDs (see Section ...