November 2011
Intermediate to advanced
608 pages
13h 33m
English
Content preview from SAP Basis Administration Handbook, NetWeaver EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Sizing Theory and Practice
SAP sizing is based on a theoretical concept called the queuing model (or queuing theory). In this kind of modeling the queuing systems are studied mathematically to estimate the performance criteria such as response times. A SAP three-tiered software architecture is studied as a queuing model with one service center (CPU). In this three-tiered SAP architecture, all the major system resources, such as memory, disk, and network load, can be spread out in such a way that any queuing can be significantly reduced. However, the CPU of the database server is the single most-limiting factor in a three-tiered SAP software architecture and is, therefore, looked at first as being responsible for any major queues, which could ...
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