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Oracle SAP Administration
by Donald K. Burleson
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Tailored to the needs of people who know Oracle, SAP R/3, or a little of both, Oracle SAP Administration explains the conventions and utilities that integrate these software tools before getting into optimization techniques and strategies for achieving increased data safety. Appropriately, author Donald Burleson emphasizes optimization of disk-access operations. He relates two methods for identifying I/O hotspots--specifically, he shows how to examine the Oracle file statistics and how to use Unix's iostat utility to get a picture of what's going on. He then describes strategies for restructuring tablespaces to minimize holdups. He also discusses RAID implementations, their performance penalties, and the increased level of reliability they provide.
Beyond file system considerations, Oracle SAP Administration describes how to reorganize tables, tablespaces, and indexes to achieve top performance. You'll find explicit listings of SQL statements and Korn shell scripts that restructure databases, plus a wealth of diagrams that illustrate how inefficient databases differ from optimized ones (a concept that's not always easy to communicate in text). The author tackles Oracle's parallel-processing solutions and explains how they (particularly the ones that came before Oracle8) interact with SAP. A quick discussion of how very large Oracle/SAP databases behave rounds out this coverage of a robust enterprise duo. --David Wall
Topics covered: Naming conventions, SAPDBA, SAPGUI, optimizing file access, reorganizing Oracle objects for better performance, administration tasks and utilities, and Oracle Parallel Server (OPS) as it applies to SAP. Burleson uses SAP R/3 and Oracle versions 7 and 8 in his documentation.
The SAP system performs a wide range of business functions, from manufacturing, sales, and distribution to accounting and human resources. By linking together these business functions, SAP helps the entire enterprise run more smoothly. The system can be used with virtually any hardware or operating system and with most database systems. Oracle is the dominant DBMS - about 80% of SAP systems use Oracle. Conversely, about 20% of large Oracle sites run SAP -- and the numbers are growing. Although overall SAP numbers are tightly guarded, it appears that there are about 20,000 SAP sites, in 90 countries. SAP-AG's 1998 sales were approximately 8.47 billion.
Although there is voluminous documentation on using SAP and using Oracle, until now there has been no book that described the intersection between the two systems. Experienced Oracle administrators have a lot to learn when their organizations start using SAP. Oracle SAP administration differs from traditional Oracle administration in many ways. SAP provides its own tools for Oracle administration; Oracle DBAs need to learn how to use these tools -- and need to learn when the tools are not the best way to accomplish a task. There are special settings for initialization (INIT.ORA) parameters, special monitoring and tuning guidelines, and a variety of other special situations.
This concise book is aimed at experienced Oracle database administrators, system administrators, and developers who are using either Oracle8 or Oracle7. It emphasizes the differences between traditional Oracle administration and Oracle/SAP administration, and it supplements the Oracle and SAP documentation. The book covers the most useful administration tools, SAPDBA and SAPGUI. It provides recommendations for the most efficient placement of data files; monitoring databases; reorganizing tables, tablespaces, and indexes; backing up and recoving databases; and tuning Oracle/SAP databases for best performance. There are chapters on special issues for parallel processing and for very large SAP databases and a summary of additional resources for the Oracle/SAP administrator. The tried-and-true tips and techniques contained in this book should save you hundreds of hours of aggravation while you adapt to using Oracle and SAP in combination.
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