CL6 counts load in a different way (will be fixed) then CL5
When one of the LVEs is limited on CPU, all processes waiting on CPU in that LVE are counted toward load.
So, if you have 100 processes in LVE overloading that LVE, your load can go as high as 100 on CL6
On CL5, all those processes in one LVE will be counted as 1.
You can also check idle cpu% -- you should see there should be plenty.
The difference is purely cosmetic/the way we count load averages. Nothing else is at play in here.
We will fix load averages issue in the next release.
And yes, psacct is broken in cL6 -- we are looking at it as well.