over 100% is not normally a bottleneck.
Since 8.1, processes have been well multi-threaded, so running over 100% just means its using more than one core
On our 6210 system (DOT8.1.2, 8 cores) for example, Wafl_EX hovers over 200% most the time - We used to get regular DFM alerts about high CPU, and a normal sysstat showed cpu pegged at 99%, but that counter is not a good indicator in the more modern multi-cpu systems.
(in later versions of DFM5 the high cpu alarm is actually disabled by default because of this)
As said above, the "avg" counter on sysstat -m output is a better indicator as thats the average of all the cores. Unfortunately DFM does not "understand" this counter.