What happens when SQL transaction log is full?

Question

When the database is configured with Full recovery model, the SQL Server Transaction Log in the Transaction Log file will be marked as inactive after committing the transaction, without being truncated automatically, as it will be waiting for a Transaction Log backup to be performed. 16 апр. 2019 г.

What happens if transaction log 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 does a large transaction log affect performance?

If the transaction log file is full in the SQL Server database, it degrades the performance of the SQL Server. It also slows down the speed of the transactional log backup process. In addition, the over-sized transaction logs decrease the disk space also because old transaction logs are not removed yet.

How do you fix a transaction log for a database is full?

Try one of the 4 suggestion below to fix this issue:1Under SQL Server Management Studio set the Maximum File Size under options for Altiris database to Unrestricted File Growth.2Increase the Restricted File Growth (MB) size to a larger value creating space for transaction logs to grow.3Shrink the log files from task.The Transaction Log for database 'DB' is full due to 'LOG_BACKUP'.

Can I delete SQL transaction log files?

Note: The active transaction log file cannot be removed. Previously, we saw that once the primary log file becomes full, SQL Server uses the secondary log file. We need to make a secondary transaction log empty, so we can remove it.

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