•Fields that provide information about command-line filtering options is not preserved: 

Replicate_Do_DB Replicate_Ignore_DB Replicate_Do_Table Replicate_Ignore_Table Replicate_Wild_Do_Table Replicate_Wild_Ignore_Table 

•The Replica_IO_State  and Replica_SQL_Running_State  fields are not preserved. If needed, these values can be obtained from the process list by using the THREAD_ID  column of the appropriate replication table and joining it with the ID  column in the INFORMATION_SCHEMA PROCESSLIST  table to select the STATE  column of the latter table. 

•The Executed_Gtid_Set  field can show a large set with a great deal of text. Instead, the Performance Schema tables show GTIDs of transactions that are currently being applied by the replica. Alternatively, the set of executed GTIDs can be obtained from the value of the gtid_executed  system variable. 

•The Seconds_Behind_Master  and Relay_Log_Space  fields are in to-be-decided status and are not preserved. 

## Replication Channels 

The first column of the replication Performance Schema tables is CHANNEL_NAME . This enables the tables to be viewed per replication channel. In a non-multisource replication setup there is a single default replication channel. When you are using multiple replication channels on a replica, you can filter the tables per replication channel to monitor a specific replication channel. See Section 17.2.2, “Replication Channels”  and Section 17.1.5.8, “Monitoring Multi-Source Replication”  for more information. 

## 27.12.11.1 The replication_connection_configuration Table 

This table shows the configuration parameters used by the replica for connecting to the source. Parameters stored in the table can be changed at runtime with the CHANGE REPLICATION SOURCE TO statement (from MySQL 8.0.23) or CHANGE MASTER TO  statement (before MySQL 8.0.23). 

Compared to the replication_connection_status  table, replication_connection_configuration  changes less frequently. It contains values that define how the replica connects to the source and that remain constant during the connection, whereas replication_connection_status  contains values that change during the connection. 

The replication_connection_configuration  table has the following columns. The column descriptions indicate the corresponding CHANGE REPLICATION SOURCE TO  | CHANGE MASTER TO options from which the column values are taken, and the table given later in this section shows the correspondence between replication_connection_configuration  columns and SHOW REPLICA | SLAVE STATUS  columns. 

## • CHANNEL_NAME 

The replication channel which this row is displaying. There is always a default replication channel, and more replication channels can be added. See Section 17.2.2, “Replication Channels”  for more information. ( CHANGE REPLICATION SOURCE TO  option: FOR CHANNEL , CHANGE MASTER TO  option: FOR CHANNEL ) 

## • HOST 

The host name of the source that the replica is connected to. ( CHANGE REPLICATION SOURCE TO option: SOURCE_HOST , CHANGE MASTER TO  option: MASTER_HOST ) 

## • PORT 

