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 three limitations is applied to any partition:

  1. Defined capacity
  2. LPAR weights
  3. Group capacity limit

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 ReportStart of change
                                           G R O U P  C A P A C I T Y  R E P O R T

                                                                                                                          PAGE    3
            z/OS V2R1               SYSTEM ID TRX2             DATE 09/28/2013            INTERVAL 05.00.000
                                    RPT VERSION V2R1 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      40  TRX1         TRX1    11000* 10000   400   NO    80.7   80.7         26      40
                TRX2         TRX2        0      4   200   NO    80.7    0.0         10      10
-----------------------------------   ------------------------------------------------------
                              TOTAL         10004   600
End of change
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.
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.
Parent topic: CPU - CPU Activity report