Virtual Log Files (VLFs) are internal divisions of physical log files created by the SQL Server Database Engine. They have no fixed size.
Question: How to Get VLF Count and Size Information in SQL Server?
If you are a seasoned DBA, then the conversations and monitoring VLFs is something you are already doing. To learn about the basics of VLF, check my earlier blog at: SQL SERVER – Detect Virtual Log Files (VLF) in LDF. Having a large number of VLFs has a performance impact and there are a number of blogs that discuss the same. As a DBA in this blog I thought of showing a simple script that will help identifying the number of VLFs available inside a SQL Server instance or a number of instances.