SQLCrazyCertified (3/15/2013)
I thought it should truncate the inactive logs after logbackup\shrink are done.
Just like any other database in full recovery, the logs are truncated (marked as reusable) when a log backup is run. Truncating doesn't mean shrinking. If you want to do a once-off shrink of the principal's log, you can use DBCC ShrinkFile, as normal.
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability