Database CPU Time Ratio" 100

Question

Hi,
I am useing the following query which gives output of "Database CPU Time Ratio" > 100. But how it could be greater that 100? It's looks odd. Could you please explain?...
select to_char(end_time, 'dd-mon-yyyy hh24:mi:ss')end_time,
value
from sys.v_$sysmetric_history
where metric_name = 'Database CPU Time Ratio'
and value>100
order by 1;
END_TIME VALUE
01-nov-2012 10:34:33 111.662276737285
1 rows selected

Answer 1

I'm referring to metric_id: 2108
select metric_name from v$metricname
where metric_id = 2108
and group_name = 'System Metrics Long Duration'
METRIC_NAME
Database CPU Time Ratio
select to_char(begin_time, 'dd-hh24') || ':00' as hour,
round(avg(maxval)) as maxval,
round(avg(average)) as average
from dba_hist_sysmetric_summary
where metric_id = 2108
and begin_time >= sysdate - 1
group by to_char(begin_time, 'dd-hh24') || ':00'
order by 1
HOUR     MAXVAL     AVERAGE
14-21:00     2247     156
14-22:00     118     54
14-23:00     214     112
15-00:00     206     83
15-01:00     196     97
15-02:00     201     100
15-03:00     207     88
15-04:00     195     92
15-05:00     200     59
15-06:00     66     14
15-07:00     168     75
15-08:00     186     87
15-09:00     196     102
15-10:00     184     98
15-11:00     200     114
15-12:00     195     103
15-13:00     188     100
15-15:00     201     101
15-16:00     196     105
15-17:00     213     89
15-18:00     197     107
15-19:00     295     126
what the value 2247 on 14 dec at 21:00 means ??