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https://dev.mysql.com/doc/refman/5.7/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_. Most system variables for Group Replication are described as dynamic, ...Without these precautions, the server with the lower major version is likely to experience difficulties and terminate with an ...
https://dev.mysql.com/doc/refman/5.7/en/group-replication-restarting-group.html
Group Replication is designed to ensure that the database service is continuously available, even if some of the servers that form the group are currently unable to participate in it due to planned maintenance or unplanned issues. As long as the ...
https://dev.mysql.com/doc/refman/5.7/en/group-replication-group-membership.html
In MySQL Group Replication, a set of servers forms a replication group. A group has a name, which takes the form of a UUID. The group is dynamic and servers can leave (either voluntarily or involuntarily) and join it at any time. If a server joins ...The list of online servers is referred to as a ...
https://dev.mysql.com/doc/refman/5.7/en/group-replication-the-group.html
In MySQL Group Replication, a set of servers forms a replication group. A group has a name, which takes the form of a UUID. The group is dynamic and servers can leave (either voluntarily or involuntarily) and join it at any time. If a server joins ...
https://dev.mysql.com/doc/refman/5.7/en/group-replication-fine-tuning-the-group-communication-thread.html
The group communication thread (GCT) runs in a loop while the Group Replication plugin is loaded. The GCT receives messages from the group and from the plugin, handles quorum and failure detection related tasks, sends out some keep alive messages ...By configuring this wait to be a little longer (doing an active wait) before actually going to sleep can prove to be beneficial in some ...
https://dev.mysql.com/doc/refman/5.7/en/group-replication-configuring-instances.html
This section explains the configuration settings required for MySQL Server instances that you want to use for Group Replication. Storage Engines Replication Framework Group Replication Settings Storage Engines For Group Replication, data must be ...
https://dev.mysql.com/doc/refman/5.7/en/group-by-optimization.html
The most general way to satisfy a GROUP BY clause is to scan the whole table and create a new temporary table where all rows from each group are consecutive, and then use this temporary table to discover groups and apply aggregate functions (if ...
https://dev.mysql.com/doc/refman/5.7/en/group-by-handling.html
SQL-92 and earlier does not permit queries for which the select list, HAVING condition, or ORDER BY list refer to nonaggregated columns that are not named in the GROUP BY clause. SQL:1999 and later permits such nonaggregates per optional feature ...
https://dev.mysql.com/doc/refman/5.7/en/group-replication-limitations.html
Note that the limitations and issues described for multi-primary mode groups can also apply in single-primary mode clusters during a failover event, while the newly elected primary flushes out its applier queue from the old primary. Tip Group ...The ...
https://dev.mysql.com/doc/refman/5.7/en/group-replication-enterprise-backup.html
This section explains how to back up and subsequently restore a Group Replication member using MySQL Enterprise Backup. The same technique can be used to quickly add a new member to a group. Backing up a Group Replication Member Using MySQL ...