Using the information in the Group Capacity Report

You can apply a defined capacity limit not only to one logical partition, but to a group of LPARs on the same CEC and manage this group considering the combined defined capacities of all members of the group.

With the group capacity limit, a third restriction to an LPAR is added. Even when an LPAR is not limited by its weight or its defined capacity, it can be limited by the group capacity. The minimum of the following limitations is applied to any partition:

Defined capacity
LPAR weights
Group capacity limit
Absolute physical hardware capping limit
Hardware group capping limit (refer to Using the information in the Hardware Group Report for more information).

The Group Capacity Report monitors the available capacity of each defined capacity group and the MSU consumption and actual capping of these groups and of each partition within such a group. It helps you to exploit the flexibility to use as much CPU as needed for short periods of time until the 4 hour rolling MSU average exceeds the defined capacity limit for the whole group.

Figure 1. CPU Activity Report - Group Capacity Report

                                           G R O U P  C A P A C I T Y  R E P O R T

                                                                                                                          PAGE    3
            z/OS V2R4               SYSTEM ID TRX2             DATE 05/11/2019            INTERVAL 05.00.000
                                    RPT VERSION V2R4 RMF       TIME 21.55.00              CYCLE 1.000 SECONDS


GROUP-CAPACITY  PARTITION    SYSTEM   --- MSU ---   WGT   ---- CAPPING ----    - ENTITLEMENT -                                      
NAME     LIMIT                         DEF    ACT         DEF   WLM%   ACT%    MINIMUM MAXIMUM                                      
RMFGRP     400  TRX1         TRX1        0      5    40   NO     0.0    0.0         29     400                                      
                TRX2         TRX2        0     11   500   NO     0.0    0.0        370     400                                      
-----------------------------------   --------------------------------------------------------                                      
                              TOTAL            16   540

Table 1. Fields in the Group Capacity Report
Field Heading	Meaning
GROUP-CAPACITY NAME	Name of the capacity group.
GROUP-CAPACITY LIMIT	MSU limit defined for the capacity group.
PARTITION	Name of the logical partition.
SYSTEM	Name of the z/OS system.
MSU DEF	User defined capacity limit.
MSU ACT	Actual MSU consumption of this partition based on the logical processor effective dispatch time.
WGT	The partition's weighting of the shared processor resources which is used for WLM Group Capacity decisions. In case of hard capped partitions (see field CAPPING DEF), dashes (---) are displayed.
CAPPING DEF	The initial capping option of the partition: YES/NO Initially capped partitions (also referred to as hard capped) are excluded from WLM group capacity management.
CAPPING WLM%	Percentage of time when WLM considers to cap the partition. For more information on WLM capping, refer to topic Workload management and Workload License Charges in z/OS MVS Planning: Workload Management.
CAPPING ACT%	Percentage of time when capping actually limited the usage of processor resources for the partition.
MINIMUM ENTITLEMENT	The minimum share of the MSU limit defined for the capacity group that the partition receives, even if all other partitions within the capacity group are running high workload. `N/A` is displayed for hard capped partitions.
MAXIMUM ENTITLEMENT	The maximum share of the MSU limit defined for the capacity group that a partition can receive if all other partitions within the capacity group are running without workload. `N/A` is displayed for hard capped partitions.