sql server backup not truncating transaction log

Question

we have created a maintenance plan to backup our databases and transaction logs every night. I noticed that when the backups are completed, the transaction logs are not getting truncated. I checked the settings and I don't see any option. we are using sql server 2008.

Answer 1

The act of backing up the transaction log should automatically truncate it. See below for information and possible reasons that would prevent this:

• Microsoft Technet Library, SQL Server 2008 R2, Transaction Log Truncation