How to shrink transaction log on mirror database (Microsoft SQL Server).


Applied to: Microsoft SQL Server 2008 R2 (but it’s similar for the other).

To shrink transaction log manually on mirror database (Microsoft SQL Server) you have to follow these steps:

  1. Verify mirroring database: database must be in Principal, Synchronized state.
  2. Execute query:
    USE Databasename
    BACKUP LOG Databasename TO DISK = N’D:\Backup\DatabaseName_log.bak’
    DBCC SHRINKFILE(‘DatabaseLogicalName_Log’, 1)
  3. After you executed the query you receive:
    Es. querybackupshrinkdatabase
  4. Re-Execute query until you receive CurrentSize = 128:

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