Database Reference
In-Depth Information
Incorrect Peak Sizing
One other common pitfall is incorrect interpretation of the peak load and peak period. The
business requirements for peak loads for some industries such as utilities are very high. A
lot of volume is processed in a very short period. If the peak load time is estimated incor-
rectly, this will give an incorrect estimate of SAPS value, causing performance issues in the
system. An experienced business team member inside the organization with a deep under-
standing of the business processes and volumes processed should be consulted in gathering
peak load and peak period information so that the sizing results are accurate.
Sizing vs. Landscaping
Usually, customers assume that SAP Quick Sizer will help them not only size the solution
that would be implemented, but also distribute the application components to different serv-
ers (landscaping). It is responsibility of the hardware vendor, in consultation with the cus-
tomer, to properly landscape the system to maximize the resource utilization and minimize
the downtime. Experienced SAP technical architects and Basis architects can also help land-
scape the solution so that requirements such as high availability, disaster recovery, and busi-
ness continuity can be ensured. One other point that is important is to install the SAP servers
in a package or virtualization environment so that they can be moved around between differ-
ent servers to model the landscaping to suit the on-going requirements of the organization.
Other Considerations
ERP sections of the sizing tool/tables do not account for system activities such as printing
and business workplace activities. This activity can be sized by filling up the sizing ele-
ments BC-PRINT and BWP, covered under the tables listed under the SAP NetWeaver sec-
tions of the sizing tool.
Summary
• SAP sizing is done initially for the purpose of budget allocation and procurement of
servers.
• The web-based online SAP Quick Sizer tool is recommended to perform initial sizing.
• SAP sizing is based on the theoretical concept of queuing modeling (queuing theory).
• SAP sizing is the process of getting hardware requirements from business require-
ments.
• The SAPS (SAP Application Performance Standard) value is used as a benchmark by
hardware vendors to provide an estimate of the hardware requirements needed for the
customer.
