Optimize the performance and economical running of your SAP system - the new 4th edition of this book shows you how! Whether you administer an R/3 or one of the newest mySAP solutions, you learn how to syste- matically identify and analyze performance problems. Another focus is the adaptation of appropriate tuning measures and verification of success. Performance optimization includes the technical side as well as the analysis of applications. For the new edition the book has been thoroughly revised and updated. A new chapter provides insight into the connection of the system to the Internet with the help of Web AS. It now also deals with the performance of Java applications as well as new releases in the database sections (MaxDB).