How big should a 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 log file be SQL Server?

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.

How long should log files be?

No more than 2 or 3 entries per user action though, unless you are doing batch operations. Don't put more than 2MB in a file, so the user can email it you. Don't keep more than 50MB of logs, because it's probably not your space you are wasting here.

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 is the size of log file?

Log file size values are in increments of 1KB, with a default value of 1024 (1 MB). When the server writes the specified number of bytes out to the log file, it will close that file and create the next one. This feature allows users to backup individual log files while the system is up.

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