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What happens if Transaction Log has not been backed up?
Under the full recovery model or bulk-logged recovery model, if the transaction log has not been backed up recently, backup might be what is preventing log truncation. If the log has never been backed up, you must create two log backups to permit the Database Engine to truncate the log to the point of the last backup.
Why is MY SQL Server transaction log full?
SQL Server Error: Fixing The Transaction Log for Database is Full Due to log_backup. This error can be due to one of two things: Before doing anything else, you should check that the physical drive still has room. If it doesn’t, you need to increase the size, or to move the log file to a drive that has more space.
What to do if your transaction log is full due?
Our end goal is to set the Transaction log file growth to unlimited so this error won’t happen again, but before you can do so, you need to alter the maximum file size settings so that you can make and save database changes.
Why is SQL Server unable to truncate transaction log?
And the log_reuse_wait_desc shows AVAILABILITY_REPLICA, that means SQL Server is waiting to send log data to one of your Always On Availability Group replicas. One of the replicas may be lagging behind due to a slow network, or it may be down altogether.
When does SQL Server transaction log become full?
When the transaction log becomes full, SQL Server Database Engine issues a 9002 error. The log can fill when the database is online, or in recovery. If the log fills while the database is online, the database remains online but can only be read, not updated.
What causes delayed transaction log truncation in SQL?
WHEN log_reuse_wait = 7 THEN ‘A database snapshot is being created. This is a routine, and typically brief, cause of delayed log truncation.’ WHEN log_reuse_wait = 8 THEN ‘A transaction log scan is occurring.
How to troubleshoot full transaction log error 9002?
WHEN log_reuse_wait = 8 THEN ‘A transaction log scan is occurring. This is a routine, and typically a brief cause of delayed log truncation.’ WHEN log_reuse_wait = 9 THEN ‘A secondary replica of an availability group is applying transaction log records of this database to a corresponding secondary database. (Full recovery model only.)’