SQL Server 2012 AlwaysON 同步延迟时间

 

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SELECT  availability_mode_desc ,         role_desc ,         replica_server_name ,         last_redone_time ,         GETDATE() now ,         DATEDIFF(ms, last_redone_time, GETDATE()) diffMS FROM    ( ( sys.availability_groups AS ag             JOIN sys.availability_replicas AS ar ON ag.group_id = ar.group_id           )           JOIN sys.dm_hadr_availability_replica_states AS ar_state ON ar.replica_id = ar_state.replica_id         )         JOIN sys.dm_hadr_database_replica_states dr_state ON ag.group_id = dr_state.group_id                                                              AND dr_state.replica_id = ar_state.replica_id;