2. PERFORMANCE REPORTING ANALYSIS › 2.6 PR/SM LPAR Performance Analysis

2.6 PR/SM LPAR Performance Analysis

This section introduces the concepts underlying IBM's
Processor Resource/Systems Manager (PR/SM) feature as
background for discussing performance management in this
environment.  The composition of a Central Electronic Complex
(CEC) is described, emphasizing those hardware and software
components to monitor and adjust to maximize throughput and
minimize response time for online systems.

PR/SM allows a CEC to be divided up into one or more logical
partitions (LPAR); each partition is independent of the
others.  PR/SM allows multiple operating System Control
Programs (SCPs), such as MVS/XA, MVS/ESA, VM/SP, or VM/XA to
share the facilities of a single CEC or one side of a
physically partitioned complex.  A CEC or physical partition
can be initialized either in LPAR mode or in basic mode.  In
basic mode, the functions of PR/SM are not available, so the
following discussion addresses LPAR mode only.

The PR/SM Performance Analysis inquiries let you track the
use of CECs and the activity of individual LPARs at any
supported timespan and summarization pattern.  Reports
display system measurements on overall CEC utilization and
configuration as well as the activity of individual LPARs and
their proportionate share of a complex.

Section 2.6.2, PR/SM LPAR Concepts, defines the terms and
explains the basic dynamics of many of the elements used in
PR/SM performance analysis.  If you are familiar with with
these terms and concepts, you must proceed directly to
Section 2.6.3.

The following sections describe the operation of the PR/SM
LPAR Analysis inquiries and how to use the reports that are
produced:

    1 - Functional Description
    2 - PR/SM LPAR Concepts
    3 - Standard Output
    4 - Usage Guidelines
    5 - Reserved
    6 - PR/SM LPAR Analysis Operation
    7 - Requirements