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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.
What causes SQL log file to grow?
SQL Transaction Log Growth. 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.
Why are my log files bigger than my database?
If you’re in simple recovery model, and you’ve got log files larger than the database, there are lots of possible causes: Someone started a transaction, locked their workstation, and went home for the weekend Someone ran a legitimately large transaction (like a huge update across the entire database, multiple times)
How big are transaction log files in SQL Server?
I ran Brent Ozar’s sp_blitz to see what areas of concern there might be on an instance of SQL Server 2012 and one of the things I saw was transaction log files that are bigger than the data file. On one database the data file is at 3.33 GB and the log is 5.19 GB. The others have a ratio that’s about the same.
How to reduce the size of a SQL log file?
Log File Auto Shrink Event Class. sys.database_files (Transact-SQL) (See the size, max_size, and growth columns for the log file or files.) You can gain space by enlarging the existing log file (if disk space permits) or by adding a log file to the database, typically on a different disk.
How can I increase the size of my transaction log file?
You can gain space by enlarging the existing log file (if disk space permits) or by adding a log file to the database, typically on a different disk. One transaction log file is sufficient unless log space is running out, and disk space is also running out on the volume that holds the log file.