As I said in my previous post , the whole idea is performance
rather faster recovery , so i don't suggest JANE to set FAST_START_IO_TARGET unless he wanted to have a 60 sec. recovery...

And my DB(s) is running on 8.1.7 and and the LOG_CHECKPOINTS_TO_ALERT is set to TRUE and we did not observe any performance issue till now.. This parameter will be observed only at every log switch by ORACLE, just to write entries in Alert.log , So if we have less number of log switches , this parameter ( TRUE value ) will do good..