I have a question about how AIX &/or nmon report the EC_User% statistic.
The extract below shows two consecutive rows on the LPAR sheet in a circumstance where the frame rapidly lost idle CPUs because of some unknown event.
At 12:15:50, nmon reported EC_USER%+EC_Sys%+EC_Wait%+EC_Idle% as 683.8% which is equivalent to Physical CPU/entitled = 2.05/0.3 = 6.837
My question relates to the values reported at 12:15:40.
At that time EC_User+EC_Sys+EC_Wait+EC_Idle% is reported as 100.1 even though the physical CPU usage is higher (2.236)
What is this 100.1% of, and why does the basis for calculating this percentage change when the shared pool is exhausted? How do I determine, by inspection of the nmon data, when the basis has changed?
|Logical Partition udecommwcs1||PhysicalCPU||virtualCPUs||logicalCPUs||poolCPUs||entitled||weight||PoolIdle||usedAllCPU%||usedPoolCPU%||SharedCPU||Capped||EC_User%||EC_Sys%||EC_Wait%||EC_Idle%||VP_User%||VP_Sys%||VP_Wait%||VP_Idle%||Folded||Pool_id||Unfolded VPs||OtherLPARs|