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sys.dm_db_mirroring_connections (Transact-SQL)

Returns a row for each connection established for database mirroring.

Applies to: SQL Server (SQL Server 2008 through current version).

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

0

NONE

Disabled

1

RC4

{Required | Required algorithm RC4}

2

AES

Required algorithm AES

3

NONE, RC4

{Supported | Supported algorithm RC4}

4

NONE, AES

Supported algorithm RC4

5

RC4, AES

Required algorithm RC4 AES

6

AES, RC4

Required Algorithm AES RC4

7

NONE, RC4, AES

Supported Algorithm RC4 AES

8

NONE, AES, RC4

Supported algorithm AES RC4

Note 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

Corresponding DDL option

NONE

Disabled

RC4

{Required | Required Algorithm RC4}

AES

Required Algorithm AES

NONE, RC4

{Supported | Supported Algorithm RC4}

NONE, AES

Supported 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.

Requires VIEW SERVER STATE permission on the server.

From

To

Relationship

dm_db_mirroring_connections.connection_id

dm_exec_connections.connection_id

One-to-one

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