Group Replication System Variables Maximum Value 65535 This system variable should have the same value on all group members. You cannot change the value of this system variable while Group Replication is running. You must stop Group Replication, change the value of the system variable, then restart Group Replication, on each of the group members. During this process, the value of the system variable is permitted to differ between group members, but some transactions on group members might be rolled back. group_replication_auto_increment_increment  determines the interval between successive values for auto-incremented columns for transactions that execute on this server instance. Adding an interval avoids the selection of duplicate auto-increment values for writes on group members, which causes rollback of transactions. The default value of 7 represents a balance between the number of usable values and the permitted maximum size of a replication group (9 members). If your group has more or fewer members, you can set this system variable to match the expected number of group members before Group Replication is started. When Group Replication is started on a server instance, the value of the server system variable auto_increment_increment  is changed to this value, and the value of the server system variable auto_increment_offset  is changed to the server ID. The changes are reverted when Group Replication is stopped. These changes are only made and reverted if  auto_increment_increment and  auto_increment_offset  each have their default value of 1. If their values have already been modified from the default, Group Replication does not alter them. From MySQL 8.0, the system variables are also not modified when Group Replication is in single-primary mode, where only one server writes. • group_replication_autorejoin_tries Command-Line Format --group-replication-autorejoin- tries=# Introduced 8.0.16 System Variable group_replication_autorejoin_tries Scope Global Dynamic Yes SET_VAR  Hint Applies No Type Integer Default Value ( ≥  8.0.21) 3 Default Value ( ≤  8.0.20) 0 Minimum Value 0 Maximum Value 2016 The value of this system variable can be changed while Group Replication is running, and the change takes effect immediately. The system variable’s current value is read when an issue occurs that means the behavior is needed. group_replication_autorejoin_tries  specifies the number of tries that a member makes to automatically rejoin the group if it is expelled, or if it is unable to contact a majority of the group before the  group_replication_unreachable_majority_timeout  setting is reached. When the member’s expulsion or unreachable majority timeout is reached, it makes an attempt to rejoin (using the current plugin option values), then continues to make further auto-rejoin attempts up to the specified number of tries. After an unsuccessful auto-rejoin attempt, the member waits 5 minutes before the next try. If the specified number of tries is exhausted without the member rejoining or being stopped, the 3798