25.12.11.1 The replication_connection_configuration Table

This table shows the configuration parameters used by the slave server for connecting to the master server. Parameters stored in the table can be changed at runtime with the CHANGE MASTER TO statement, as indicated in the column descriptions.

Compared to the replication_connection_status table, replication_connection_configuration changes less frequently. It contains values that define how the slave connects to the master 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 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 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 16.2.3, “Replication Channels” for more information. (CHANGE MASTER TO option: FOR CHANNEL)

• HOST

  The master host that the slave is connected to. (CHANGE MASTER TO option: MASTER_HOST)

• PORT

  The port used to connect to the master. (CHANGE MASTER TO option: MASTER_PORT)

• USER

  The user name of the account used to connect to the master. (CHANGE MASTER TO option: MASTER_USER)

• NETWORK_INTERFACE

  The network interface that the slave is bound to, if any. (CHANGE MASTER TO option: MASTER_BIND)

• AUTO_POSITION

  1 if autopositioning is in use; otherwise 0. (CHANGE MASTER TO option: MASTER_AUTO_POSITION)

• SSL_ALLOWED, SSL_CA_FILE, SSL_CA_PATH, SSL_CERTIFICATE, SSL_CIPHER, SSL_KEY, SSL_VERIFY_SERVER_CERTIFICATE, SSL_CRL_FILE, SSL_CRL_PATH

  These columns show the SSL parameters used by the slave to connect to the master, if any.

  SSL_ALLOWED has these values:

  • Yes if an SSL connection to the master is permitted

  • No if an SSL connection to the master is not permitted

  • Ignored if an SSL connection is permitted but the slave server does not have SSL support enabled

  CHANGE MASTER TO options for the other SSL columns: MASTER_SSL_CA, MASTER_SSL_CAPATH, MASTER_SSL_CERT, MASTER_SSL_CIPHER, MASTER_SSL_CRL, MASTER_SSL_CRLPATH, MASTER_SSL_KEY, MASTER_SSL_VERIFY_SERVER_CERT.

• CONNECTION_RETRY_INTERVAL

  The number of seconds between connect retries. (CHANGE MASTER TO option: MASTER_CONNECT_RETRY)

• CONNECTION_RETRY_COUNT

  The number of times the slave can attempt to reconnect to the master in the event of a lost connection. (CHANGE MASTER TO option: MASTER_RETRY_COUNT)

• HEARTBEAT_INTERVAL

  The replication heartbeat interval on a slave, measured in seconds. (CHANGE MASTER TO option: MASTER_HEARTBEAT_PERIOD)

• TLS_VERSION

  The TLS version used on the master. For TLS version information, see Section 6.3.2, “Encrypted Connection TLS Protocols and Ciphers”. (CHANGE MASTER TO option: MASTER_TLS_VERSION)

  This column was added in MySQL 5.7.10.

TRUNCATE TABLE is not permitted for the replication_connection_configuration table.

The following table shows the correspondence between replication_connection_configuration columns and SHOW SLAVE STATUS columns.

replication_connection_configuration Column	SHOW SLAVE STATUS Column
CHANNEL_NAME	Channel_name
HOST	Master_Host
PORT	Master_Port
USER	Master_User
NETWORK_INTERFACE	Master_Bind
AUTO_POSITION	Auto_Position
SSL_ALLOWED	Master_SSL_Allowed
SSL_CA_FILE	Master_SSL_CA_File
SSL_CA_PATH	Master_SSL_CA_Path
SSL_CERTIFICATE	Master_SSL_Cert
SSL_CIPHER	Master_SSL_Cipher
SSL_KEY	Master_SSL_Key
SSL_VERIFY_SERVER_CERTIFICATE	Master_SSL_Verify_Server_Cert
SSL_CRL_FILE	Master_SSL_Crl
SSL_CRL_PATH	Master_SSL_Crlpath
CONNECTION_RETRY_INTERVAL	Connect_Retry
CONNECTION_RETRY_COUNT	Master_Retry_Count
HEARTBEAT_INTERVAL	None
TLS_VERSION	Master_TLS_Version