What Is Filling Up The Transaction Log

SELECT db.[name] AS [Database Name] ,
 db.recovery_model_desc AS [Recovery Model] ,
 db.log_reuse_wait_desc AS [Log Reuse Wait Description] ,
 ls.cntr_value AS [Log Size (KB)] ,
 lu.cntr_value AS [Log Used (KB)] ,
 CAST(CAST(lu.cntr_value AS FLOAT) / CAST(ls.cntr_value AS FLOAT)
 AS DECIMAL(18,2)) * 100 AS [Log Used %] ,
 db.[compatibility_level] AS [DB Compatibility Level] ,
 db.page_verify_option_desc AS [Page Verify Option]
FROM sys.databases AS db
 INNER JOIN sys.dm_os_performance_counters AS lu
 ON db.name = lu.instance_name
 INNER JOIN sys.dm_os_performance_counters AS ls
 ON db.name = ls.instance_name
WHERE lu.counter_name LIKE 'Log File(s) Used Size (KB)%'
 AND ls.counter_name LIKE 'Log File(s) Size (KB)%' ;