Database Mirroring - sys.dm_db_mirroring_connections

THIS TOPIC APPLIES TO:yesSQL Server (starting with 2008)noAzure SQL DatabasenoAzure SQL Data Warehouse noParallel Data Warehouse

Returns a row for each connection established for database mirroring.

Column name Data type Description
connection_id uniqueidentifier Identifier of the connection.
transport_stream_id uniqueidentifier Identifier of the SQL Server Network Interface (SNI) connection used by this connection for TCP/IP communications.
state smallint Current state of the connection. Possible values:

1 = NEW

2 = CONNECTING

3 = CONNECTED

4 = LOGGED_IN

5 = CLOSED
state_desc nvarchar(60) Current state of the connection. Possible values:

NEW

CONNECTING

CONNECTED

LOGGED_IN

CLOSED
connect_time datetime Date and time at which the connection was opened.
login_time datetime Date and time at which login for the connection succeeded.
authentication_method nvarchar(128) Name of the Windows Authentication method, such as NTLM or KERBEROS. The value comes from Windows.
principal_name nvarchar(128) Name of the login that was validated for connection permissions. For Windows Authentication, this value is the remote user name. For certificate authentication, this value is the certificate owner.
remote_user_name nvarchar(128) Name of the peer user from the other database that is used by Windows Authentication.
last_activity_time datetime Date and time at which the connection was last used to send or receive information.
is_accept bit Indicates whether the connection originated on the remote side.

1 = The connection is a request accepted from the remote instance.

0 = The connection was started by the local instance.
login_state smallint State of the login process for this connection. Possible values:

0 = INITIAL

1 = WAIT LOGIN NEGOTIATE

2 = ONE ISC

3 = ONE ASC

4 = TWO ISC

5 = TWO ASC

6 = WAIT ISC Confirm

7 = WAIT ASC Confirm

8 = WAIT REJECT

9 = WAIT PRE-MASTER SECRET

10 = WAIT VALIDATION

11 = WAIT ARBITRATION

12 = ONLINE

13 = ERROR
login_state_desc nvarchar(60) Current state of login from the remote computer. Possible values:

Connection handshake is initializing.

Connection handshake is waiting for Login Negotiate message.

Connection handshake has initialized and sent security context for authentication.

Connection handshake has received and accepted security context for authentication.

Connection handshake has initialized and sent security context for authentication. There is an optional mechanism available for authenticating the peers.

Connection handshake has received and sent accepted security context for authentication. There is an optional mechanism available for authenticating the peers.

Connection handshake is waiting for Initialize Security Context Confirmation message.

Connection handshake is waiting for Accept Security Context Confirmation message.

Connection handshake is waiting for SSPI rejection message for failed authentication.

Connection handshake is waiting for Pre-Master Secret message.

Connection handshake is waiting for Validation message.

Connection handshake is waiting for Arbitration message.

Connection handshake is complete and is online (ready) for message exchange.

Connection is in error.
peer_certificate_id int The local object ID of the certificate used by the remote instance for authentication. The owner of this certificate must have CONNECT permissions to the database mirroring endpoint.
encryption_algorithm smallint Encryption algorithm that is used for this connection. NULLABLE. Possible values:

Value:0

Description: None

DDL Option: Disabled

Value:1

Description: RC4

DDL Option: {Required | Required algorithm RC4}

Value:2

Description: AES

DDL Option: Required algorithm AES

Value:3

Description: None, RC4

DDL Option: {Supported | Supported algorithm RC4}

Value:4

Description: none, AES

DDL Option: Supported algorithm RC4

Value:5

Description: RC4, AES

DDL Option: Required algorithm RC4 AES

Value:6

Description: AES, RC4

DDL Option: Required Algorithm AES RC4

Value:7

Description: NONE, RC4, AES

DDL Option: Supported Algorithm RC4 AES

Value:8

Description: NONE, AES, RC4

DDL Option: Supported algorithm AES RC4

Note: The RC4 algorithm is only supported for backward compatibility. New material can only be encrypted using RC4 or RC4_128 when the database is in compatibility level 90 or 100. (Not recommended.) Use a newer algorithm such as one of the AES algorithms instead. In SQL Server 2012 and higher versions, material encrypted using RC4 or RC4_128 can be decrypted in any compatibility level.
encryption_algorithm_desc nvarchar(60) Textual representation of the encryption algorithm. NULLABLE. Possible Values:

Description: None

DDL Option: Disabled

Description: RC4

DDL Option: {Required | Required Algorithm RC4}

Description: AES

DDL Option: Required Algorithm AES

Description: NONE, RC4

DDL Option: {Supported | Supported Algorithm RC4}

Description: NONE, AES

DDL Option: Supported Algorithm RC4

Description: RC4, AES

DDL Option: Required Algorithm RC4 AES

Description: AES, RC4

DDL Option: Required Algorithm AES RC4

Description: NONE, RC4, AES

DDL Option: Supported Algorithm RC4 AES

Description: NONE, AES, RC4

DDL Option: Supported Algorithm AES RC4
receives_posted smallint Number of asynchronous network receives that have not yet completed for this connection.
is_receive_flow_controlled bit Whether network receives have been postponed due to flow control because the network is busy.

1 = True
sends_posted smallint The number of asynchronous network sends that have not yet completed for this connection.
is_send_flow_controlled bit Whether network sends have been postponed due to network flow control because the network is busy.

1 = True
total_bytes_sent bigint Total number of bytes sent by this connection.
total_bytes_received bigint Total number of bytes received by this connection.
total_fragments_sent bigint Total number of database mirroring message fragments sent by this connection.
total_fragments_received bigint Total number of database mirroring message fragments received by this connection.
total_sends bigint Total number of network send requests issued by this connection.
total_receives bigint Total number of network receive requests issued by this connection.
peer_arbitration_id uniqueidentifier Internal identifier for the endpoint. NULLABLE.

Permissions

Requires VIEW SERVER STATE permission on the server.

Physical Joins

join for sys.join_dm_db_mirroring_connections

Relationship Cardinalities

From To Relationship
dm_db_mirroring_connections.connection_id dm_exec_connections.connection_id One-to-one

See Also

Dynamic Management Views and Functions (Transact-SQL)
Monitoring Database Mirroring (SQL Server)