log file switch completion,log file switch(checkpoint incomplete),log file switch(archiving needed)
logfile switchcompletion,logfileswitch(archivingneeded)logfileswitch(checkpointincomplete)这三个等待事件是没有参数的,在10g中,它位于configuration类下 SQL>selectname,parameter1,parameter2,parameter3,wait_classfromv$event_n