• Article

sys.dm_db_mirroring_connections (Transact-SQL)

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 Description Corresponding DDL option
0NONE Disabled
1RC4 {Required | Required algorithm RC4}
2AES Required algorithm AES
3NONE, RC4{Supported | Supported algorithm RC4}
4NONE, AESSupported algorithm RC4
5RC4, AES Required algorithm RC4 AES
6AES, RC4 Required Algorithm AES RC4
7NONE, RC4, AES Supported Algorithm RC4 AES
8NONE, AES, RC4 Supported algorithm AES RC4

encryption_algorithm_desc

nvarchar(60)

Textual representation of the encryption algorithm. NULLABLE. Possible Values:

Description Corresponding DDL option
NONE Disabled
RC4 {Required | Required Algorithm RC4}
AES Required Algorithm AES
NONE, RC4{Supported | Supported Algorithm RC4}
NONE, AESSupported Algorithm RC4
RC4, AES Required Algorithm RC4 AES
AES, RC4 Required Algorithm AES RC4
NONE, RC4, AES Supported Algorithm RC4 AES
NONE, AES, RC4 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

Change History

Updated content

Added missing values to the login_state and login_state_desc descriptions.