IBM Z9, Planning Manual

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Reviewing and Changing Current Channel Status
Use the tasks available on the CHPID Operations task list to display and modify
channel status information in an LP’s CHPID work area.
Reviewing and Changing Current Logical Partition Controls
Use the Change LPAR Controls task available from the CPC Operational
Customization tasks list to display and modify LP controls for an LP.
Reviewing and Changing Current Logical Partition Group Controls
Change LPAR Group Controls allows you to define LPAR group capacity limits,
allowing you to specify one or more groups of LPARs on a server, each with its own
capacity limit. This is designed to allow z/OS to manage the groups in such a way
that the sum of the LPARs’ CPU utilization within a group will not exceed the
group’s defined capacity. Each LPAR in a group can still optionally continue to
define an individual LPAR capacity limit.
LPAR group capacity limit requires that all LPARs to be managed in the group be
running z/OS or z/OS.e V1.8 or later. LPAR group capacity limits may help provision
a portion of a System z9 server to a group of LPARs allowing the CPU resources to
float more readily between those LPARs, resulting in more productive use of
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Figure 5-2. Change Logical Partition Controls Page. The Current Weight for an active shared LP will always show
nonzero. For non-WLM managed logical partitions, the Current Weight will always be equal to the Initial Processing
Weight. The Current Weight for WLM managed logical partitions will be whatever value WLM has currently assigned to
the LP. Current Capping will always be indicated for an active LP that has Initial Capping. Current capping will also be
indicated for an LP which has been dynamically soft-capped by the Workload Manager (WLM).
Chapter 5. Monitoring the Activities of Logical Partitions
5-3