Performance Schema Replication Tables •Index on ( THREAD_ID ) • CHANNEL_NAME • HOST • PORT • NETWORK_NAMESPACE • WEIGHT 5006 The priority of this replication source server in the replication channel’s source list. The weight is from 1 to 100, with 100 being the highest, and 50 being the default. When the asynchronous connection failover mechanism activates, the source with the highest weight setting among the alternative sources listed in the source list for the channel is chosen for the first connection attempt. If this attempt does not work, the The network namespace for this replication source server. If this value is empty, connections use the default (global) namespace. The port number for this replication source server. The host name for this replication source server. The replication channel for which this replication source server is part of the source list. If this channel’s connection to its current source fails, this replication source server is one of its potential new sources. The  replication_asynchronous_connection_failover  table has these columns: This table holds the replica’s source lists for each replication channel for the asynchronous connection failover mechanism. The asynchronous connection failover mechanism automatically establishes an asynchronous (source to replica) replication connection to a new source from the appropriate list after the existing connection from the replica to its source fails. You set and manage source lists using the  asynchronous_connection_failover_add_source  and asynchronous_connection_failover_delete_source  functions to add and remove replication source servers from the source list for a replication channel. To add and remove managed groups of servers, use the  asynchronous_connection_failover_add_managed  and asynchronous_connection_failover_delete_managed  functions instead. For more information, see Section 17.4.9, “Switching Sources with Asynchronous Connection Failover” . 27.12.11.3 The replication_asynchronous_connection_failover Table replication_connection_status  Column SHOW REPLICA | SLAVE STATUS  Column SOURCE_UUID Master_UUID THREAD_ID None SERVICE_STATE Replica_IO_Running RECEIVED_TRANSACTION_SET Retrieved_Gtid_Set LAST_ERROR_NUMBER Last_IO_Errno LAST_ERROR_MESSAGE Last_IO_Error LAST_ERROR_TIMESTAMP Last_IO_Error_Timestamp The following table shows the correspondence between  replication_connection_status  columns and  SHOW REPLICA | SLAVE STATUS  columns.