VACUUM-like database cleaning possible?

[fredlcore]

First of all, thank you for providing this library! It's almost exactly what I'm looking for, but one thing I couldn't find out is how to deal with deleting log rows that are older than a certain amount of days and at the same time freeing the space taken up by these entries, much like the DELETE and VACUUM statements in sqlite3. Or is there any other way I could deal with the fact that I just want x days worth of data in the database without creating new database files every x days?