A customer has been creating LPARs on a new POWER8 system. After successfully activating the first 10 LPARs, the customer notices that the available RAM on physical machine reported by the HMC has…

A customer has been creating LPARs on a new POWER8 system. After successfully activating the first 10 LPARs, the customer notices that the available RAM on physical machine reported by the HMC has reduced more than the sum of the memory currently allocated to the activated LPARs. The Customer appreciates there will be a memory overhead for each activated LPAR, but the overhead appears more than expected. Which LPAR attribute is the likely cause for the excess in memory consumption?