How did you get the figure of 600M of redo??
THe log switches occurs like every 2 hrs during normal activity.
THE reason I am worried is whenever there is high activity(in fact any large update or inserts with LOBs) the redo logs switch every minute (even with 14 50M groups) this average wait goes up a lot and results in checkpoint not complete/aiowait errors, I don't want the system to crash during high load.

Please adise.

Thanx