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https://dev.mysql.com/doc/refman/8.0/en/group-replication-gtids.html
Group Replication uses GTIDs (global transaction identifiers) to track exactly which transactions have been committed on every server instance. The settings gtid_mode=ON and enforce_gtid_consistency=ON are required on all group members. Incoming ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-online-upgrade-combining-versions.html
At this point the member applies the policies for its new server version, which might have changed from the policies it applied when it originally joined the group. Group Replication is versioned according to the MySQL Server version that the Group ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-online-upgrade-considerations.html
When upgrading an online group you should consider the following points: Regardless of the way which you upgrade your group, it is important to disable any writes to group members until they are ready to rejoin the group. When a member is stopped, ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-replication-group-members.html
At that point, servers exchange some of their metadata to synchronize themselves and continue to cooperate together. The performance_schema.replication_group_members table is used for monitoring the status of the different server instances that are ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-responses-failure.html
The responses of group members, including the failed member itself, to these situations can be configured at a number of points in the process. Group Replication's failure detection mechanism is designed to identify group members that are no longer ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-restarting-group.html
The exact point at which a transaction is committed depends on the transaction consistency level that is set for the group (see Section 20.5.3, “Transaction Consistency Guarantees”). Group Replication is designed to ensure that the database ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-use-cases.html
Alternative to asynchronous Source-Replica replication - In certain situations, using a single source server makes it a single point of contention. Group Replication enables you to create fault-tolerant systems with redundancy by replicating the ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication.html
There is a built-in group membership service that keeps the view of the group consistent and available for all servers at any given point in time. This chapter explains MySQL Group Replication and how to install, configure and monitor groups. MySQL ...
https://dev.mysql.com/doc/refman/8.0/en/information-functions.html
For manual ROLLBACK, the value of LAST_INSERT_ID() is not restored to that before the transaction; it remains as it was at the point of the ROLLBACK. It may be used to time how quickly MySQL processes the expression. The result value is 0, or NULL ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-buffer-pool-stats-table.html
Pages made “young” take longer to age out of the buffer pool, while pages made “not young” are moved much closer to the point of eviction. The INNODB_BUFFER_POOL_STATS table provides much of the same buffer pool information provided in SHOW ...