%DB Time in AWR report seem wrong.

Hi, I have a RAC 2 node DB. Today, I get awr on 1 node to monitor database working.

I pay attention to % DB time. As I know that DB Time = CPU I/O Time + Non Idle waittime.

But in my AWR Report, sum of % Non Idle waittime is more than 100%.

Could you explain this case for me?

Thank in advance

Event	Waits	Total Wait Time (sec)	Wait Avg(ms)	% DB time	Wait Class
DFS lock handle	67,506	31.3K	463	53.5	Other
DB CPU		15.5K		26.5
log file sync	2,320,811	9995.3	4	17.1	Commit
db file sequential read	1,858,439	4925.5	3	8.4	User I/O
inactive transaction branch	5,492	4893.9	891	8.4	Other
gc buffer busy acquire	1,038,723	2958	3	5.1	Cluster