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The value of this system variable can be changed while Group Replication is running, and the change takes effect immediately. 

group_replication_flow_control_mode  specifies the mode used for flow control. 

• group_replication_flow_control_period 

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The value of this system variable can be changed while Group Replication is running, and the change takes effect immediately. 

group_replication_flow_control_period  defines how many seconds to wait between flow control iterations, in which flow control messages are sent and flow control management tasks are run. 

• group_replication_flow_control_release_percent 

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The value of this system variable can be changed while Group Replication is running, and the change takes effect immediately. 

group_replication_flow_control_release_percent  defines how the group quota should be released when flow control no longer needs to throttle the writer members, with this percentage being the quota increase per flow control period. A value of 0 implies that once the flow control thresholds 

