When is Log File Data deleted?

When is Log File data in my Catalyst deleted?

Log File data is not deleted. Log File data segments can be over-written when the data segment has been fully delivered to all eligible destinations. The oldest data is over-written first.

Data can also be over-written when the Catalyst is unable to deliver the log file. In this instance, the data can be over-written if the parameter "When reserved storage is completely full" is set to "over-write oldest log file data."