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What happens when SQL log file is full?

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 when SQL 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.

What happens when SQL log file reaches max size?

In the heavily transactional systems with excessive logging operations, the SQL Server Transaction Log file will grow rapidly, until it reaches its maximum size, generating error number 9002. And if the auto-growth option is enabled, the underlying disk drive will run out of free space.

Is it OK to delete SQL log files?

In some cases, the Microsoft SQL Server Database Transaction Log (. LDF) file becomes very huge. It's wasting a lot of disk space and causing some problems if you want to backup and restore the database. We can delete the log file and create a new log file with the minimum size.

Does SQL log file 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 big should SQL log file be?

Although there is no one optimal value for Transaction Log File initial size and auto-growth that fits all situations, but setting the initial size of the SQL Server Transaction Log file to 20-30% of the database data file size and the auto-growth to a large amount, above 1024MB, based on your database growth plan can ...

Should I shrink SQL log file?

To reduce the physical size of a physical log file, you must shrink the log file. This is useful when you know that a transaction log file contains unused space.

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