What are transaction logs in SQL Server?
Every SQL Server database has a transaction log that records all transactions and the database modifications made by each transaction. The transaction log is a critical component of the database. If there is a system failure, you will need that log to bring your database back to a consistent state.
How does SQL Server transaction log work?
The transaction log is an integral part of SQL Server. Every database has a transaction log that is stored within the log file that is separate from the data file. A transaction log basically records all database modifications. When a user issues an INSERT, for example, it is logged in the transaction log.
How to monitor SQL Server transaction log file space usage?
This article explains how to monitor SQL Server transaction log file space usage over a period of time with the help of an SQL Server Agent Job. Using DBCC SQLPERF (LOGSPACE) command one can view the transaction log space usage statistics for all databases.
How is the transaction log used in SQL Server?
source (SQL Server 2005 Books Online) The way the transaction log is used is that each virtual log file is written to and when the data is committed and a checkpoint occurs the space becomes useable again.
How to monitor transaction growth in SQL Server?
SQL Transaction Log Growth 1 Index Rebuild and Reorganize. 2 SQL Transaction Log Backup. 3 Active Transactions. 4 SQL Server Replication and Change Data Capture. 5 Database Mirroring and Always on Availability Group. 6 Long Running Backup.
How to control the size of a transaction log file?
To change the growth increment, use the FILEGROWTH option. A value of 0 indicates that automatic growth is set to off and no additional space is permitted. To control the maximum the size of a log file in KB, MB, GB, and TB units or to set growth to UNLIMITED, use the MAXSIZE option.