Database shrink log file

If the file size doesn't change after an error-less shrink operation, try the following to verify that the file has adequate free space:. The shrink operation can't reduce the file size any further if there's insufficient free space available. Typically it's the log file that appears not to shrink. This non-shrinking is usually the result of a log file that hasn't been truncated.

A transaction running under a row versioning-based isolation level can block shrink operations. This message is logged every five minutes in the first hour and then every hour. For example, if the error log contains the following error message then the following error will occur:. This message means snapshot transactions with timestamps older than the last transaction that the shrink operation completed are blocking the shrink operation. The following example shrinks the log file in the AdventureWorks database to 1 MB.

The following example truncates the primary data file in the AdventureWorks database. The sys. The following example demonstrates emptying a file so it can be removed from the database.

Log truncation frees up space in the log file so the transaction log can reuse it. You can also choose to either release unused space, reorganize pages before releasing unused space, or empty file by migrating the data to other files in the same filegroup:. Why would you set to simple? You will lose any transaction information. The DBCC commands allow you to perform several operations. Apart from benefits, shrinking transaction log has limitations too.

Some of them are mentioned below:. The shrinking process has various negative consequences. However, it is necessary to perform this process because the growth rate of log files is tremendous. It helps in maintaining a regular space in the system.

So, what is the safe way to shrink log file in sql server and avoid their corruption? It is very simple to use. So, you can download it into your system. It has a date filter that helps you to recover files of a particular period. Log files are created with every transaction in the database.

Therefore, these files cover a large space. Shrinking these files is the suitable option to minimize this covered space. The path is not editable, but it can be copied to the clipboard. Currently allocated space For data files, displays the current allocated space. Release unused space Cause any unused space in the files to be released to the operating system and shrink the file to the last allocated extent, reducing the file size without moving any data.

No attempt is made to relocate rows to unallocated pages. When this option is selected, the user must specify a target file size in the Shrink file to box. Shrink file to Specifies the target file size for the shrink operation. The size cannot be less than the current allocated space or more than the total extents allocated to the file.

Entering a value beyond the minimum or the maximum will revert to the min or the max once the focus is changed or when any of the buttons on the toolbar are clicked. Empty file by migrating the data to other files in the same filegroup Migrate all data from the specified file. Selecting this option causes any unused space in the file to be released to the operating system and shrinks the file to the last allocated extent.

This reduces the file size without moving any data.