Truncate and Shrink SharePoint Transaction Logs, Databases

Some of the Transaction Logs and databases grown rapidly and on urgent basis I had to truncate the Log files on SharePoint Content Databases. Here is the SQL script to truncate and shrink SharePoint transaction log:

Use <database_name>
GO

ALTER DATABASE <database_name> SET RECOVERY SIMPLE
GO

DBCC SHRINKFILE (Database_Log_Name, 1); 
GO

ALTER DATABASE <database_name> SET RECOVERY FULL
GO

Important: Please note the <database_Name> and <database_log_Name> in above examples are logical names.

This sets the recovery model to "SIMPLE" temporarily, Shrink the Log file and set back to "FULL" recovery model. After executing the SQL script to truncate transaction log in my SharePoint 2010, it recovered me considerable space now!

Shrink SQL Server Database, Log Files from SSMS:
Shrinking can be done from SQL Server Management Studio also.
Go to SSMS >> Right click the target Database >> Tasks >> Shrink >> Files (or Database)

Select the File Type and click on "OK" button to start shrinking. Here I've selected "Log" File type to shrink SharePoint transaction log files.

Same applies when you want to shrink SharePoint database size. I find it useful when I had to shrink SharePoint search databases.

How about removing the existing Log file and create a new one?
I had SharePoint Content database log file of 30GB! So, wanted to remove the existing log and create a new one. Simply add a new log file and remove the existing one from SSMS. Or you can:

1.     Detach the database
2.     Rename the log file
3.     Attach the database without the log file
4.     Delete the old log file

In case you don't find any decrease in log file size, Try setting the Database to Single user Mode (Go to : Database Properties >> Options >> Set "Restrict Access" to Single User ), repeat the above steps and then revert the status again to Multi_User!