CA MICS Hardware and SCP Analyzer (RMF) Queries › Mainframe MSU Utilization and LPAR Capping › RMFMMC – Monthly LPAR MSU Use and Capacity Limits › Uses

Uses

The processing capacity of mainframe CPCs is expressed in MSUs (Millions of Service Units per Hour). One of the characteristics of a specific CPC model is its MSU capacity. This capacity is indicative of its workload processing capability and is directly related to the number of general-purpose CP engines configured. Each LPAR that is assigned logical CP processors uses some amount of the available CPC MSUs. The MSU capacity of a CPC and of individual LPARs can influence the cost of software licensed to run on LPARs. Some software licensing costs can be lowered by defining a capacity limit for an LPAR. The limit prevents the LPAR from using the full MSU capacity associated with the logical processors assigned to it. The RMFMMC charts are useful for visualizing longer term resource usage trends for your z/OS LPARs. The average MSU usage bar is the most important. The MIN and MAX represent singular extremes, while the average MSU use is the average of all RMF intervals over each time period charted,