What is transaction log for database is 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.
How long does a transaction log backup take?
Taking a log backup every 15 to 30 minutes might be enough. If your business requires that you minimize work-loss exposure, consider taking log backups more frequently. More frequent log backups have the added advantage of increasing the frequency of log truncation, resulting in smaller log files.
How often does SQL Server Backup transaction log?
While the full database backup was running I kicked off transaction log backups every 5 minutes and they seemed to work fine. I changed the transaction log backup to its normal schedule. After the full backup was completed, I reviewed the sql log, drive space, transaction log size, open transactions and everything seemed fine.
What happens when SQL transaction log is full?
For a VLF to be reused by SQL, it needs to be inactive. If all the VLFs in the log are active and SQL has filled the one it is writing to, the transaction log will grow or, if it cannot grow, data modifications will fail with error 9002. (The transaction log for database ‘ ‘ is full.
How are transaction logs used in database recovery?
Known good points from which to begin applying transaction logs during database recovery are created by checkpoints. For more information, see Database Checkpoints (SQL Server). The transaction log supports the following operations: Individual transaction recovery. Recovery of all incomplete transactions when SQL Server is started.
What to do when SQL log fills up?
I changed the transaction log backup to its normal schedule. After the full backup was completed, I reviewed the sql log, drive space, transaction log size, open transactions and everything seemed fine. If it is a cluster, you could try failing back to the other node and see if that fixes the problem, which in my case was the need for a recompile.