That's what I am doing. My batch wakes up every fifteen minutes and if any new Archive logfile occurs, it transfers it to Standby. My question is not that.

What if there is not Logwitch for 60 minutes. Then Production failes, and the data in Online redo logs are not transferred for the past 60 minutes, and I will loose the data. How to make sure that, I will not loose data not older than 15 minutes