SAP TRAINING CANTON FEB/MAR 2001
Flow
- Check with Central Instance which server is least loaded
- Servers check with each other, one responds to CI
- Make a straight connection to that server
THREE TIER CLIENT/SERVER MODEL............. 3
OVERVIEW.......................................................... 3
FLOW................................................................... 4
APPLICATION SERVER.................................... 4
DATABASE SERVER........................................... 5
PERFORMANCE TROUBLESHOOTING............ 6
PERFORMANCE BOTTLENECKS...................... 6
PERFORMANCE PROBLEMS AND TROUBLESHOOTING TECHNIQUES........... 6
DIALOG RESPONSE........................................... 6
BOTTOM-UP TROUBLESHOOTING..................... 7
UNIX............................................ 7
DATABASE................................. 10
BASIS LAYER............................. 14
DIALOG (PER PROCESS)........... 17
BATCH (PER PROCESS)............. 17
TOP-DOWN TROUBLESHOOTING.............. 19
ACUTE PROBLEMS......................................... 19
QUALITATIVE DATA...................................... 19
QUANTITATIVE DATA..................................... 19
TRANSACTION OVERVIEW............................ 23
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