June 2004
Intermediate to advanced
396 pages
9h 28m
English
book
Building and Scaling SAP Business Information Warehouse on DB2 UDB ESE
by Chuck Ballard, Andreas Christian, Theodor H. Kuebler, Rodrigo A. Schiavon
Content preview from Building and Scaling SAP Business Information Warehouse on DB2 UDB ESE
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Chapter 8. SAP BW performance 271
8.4.1 Performance bottlenecks
In an SAP BW system there is a high level of interdependency between any
system bottlenecks and long-running transactions or programs.
The cause of
system bottlenecks could be:
Lack of hardware resources, such as:
–CPU
– Real and virtual memory
– Disk- devices, caches, controller, and access paths, resulting in poor
Input/output operations (I/O waits)
Poor configuration of:
–Memory
–SAP buffers
– Workprocess distribution
The cause of
long running programs could be:
Unnecessary functionality
Inefficient implementation of technology, such as:
– Database table buffering
– Database indexes
– ABAP coding (inefficient SQL)
lack of experience regarding the implementation
–Customizing
– Sub-opt ...
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