Managing Serviceguard Extension for SAP, December 2007

Understanding Serviceguard Extension for SAP
Combining SGeSAP with Complementary Solutions
Chapter 148
Workload Manager SAP Toolkit
HP-UX provides resource management functions based on the Process
Resource Manager (PRM). This provides a way to control the amount of
core shares, memory and disk bandwidth that specific processes get
access to during peak system load. It allows to manually dedicate
resources to specific SAP applications. Workload Manager (WLM) is
based on PRM and provides dynamic and automatic resource balancing
used for goal-based workload management. Basic configurations of WLM
and SAP are exemplified as part of the WLM application toolkits.
SGeSAP enhances the WLM capabilities by enabling a tight integration
of the SAP ABAP operation modes and WLM service level objectives.
SGeSAP also allows WLM to distinguish the different ABAP work
process types within a single SAP instance. The SGeSAP dispatcher
monitor will keep track that the corresponding process lists are always
up to date in WLM.
One of the key benefits of this type of configuration is that individual
service level objectives can be defined with different priorities. For
example, dialog processes can get higher priority than batch processes.
This helps to ensure that batch jobs don’t slow down interactive
operations beyond a guaranteed limit. It is possible to further expand on
this configuration and for example create a time schedule based
configuration where batch processes have a higher priority at certain
times of the month in order to run critical reports.
It is an option to directly correlate the amount of guaranteed resources to
the number of work processes that are defined in the current SAP
operation mode. In this case, the administration and configuration
control can be effectively moved to the standard SAP operation mode
transactions and requires no additional configuration changes after the
initial setup of WLM.