How big should SQL log file be?

Question

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 . 22 апр. 2019 г.

How big should my log file be?

A good STARTING POINT for your log file is twice the size of the largest index in your database, or 25% of the database size. Whichever is larger. Why? If the largest object in your database is larger than 25% of your database, you are likely running some type of maintenance.

Why is SQL log file so large?

Large database transactions, such as importing large amounts of data, can lead to a large transaction log file. Transaction log backups not happening fast enough causes the SQL log file to become huge. SQL log files also enlarge due to incomplete replication or availability group synchronization.

What happens when SQL log file 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 do I reduce the size of my SQL database log?

Transaction Log Shrinking Methods1we are referring to the option available in SSMS by Right Click DB Name -> Tasks -> Shrink -> Files -> File type -> Log.2does reduce the physical log file size by freeing up internal free space of the transaction log.Reduce Transaction Log File Size - Backup vs Shrink vs Truncate ...

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