With over 20 years combined experience solving real-world performance issues our IFS benchmarking team share their top tips.

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3. REAL-WORLD PERFORMANCE
Troubleshooters Top 5—Real-world performance tuning of
IFS Applications
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4. AGENDA
Evolution
Configuration
Toolbox
Top 5—performance issues
Questions
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5. WHO WE ARE
JONAS GÖRANSSON
Principal Systems Engineer
Worked for IFS since 1993
IFS Consulting, IFS R&D
STEFAN LÖVGREN
Principal Systems Engineer
Worked for IFS R&D since 1999
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6. WHAT WE DO
IFS BENCHMARK TEAM
Sizing of IFS Applications (IFS Sizing Guides)
Performance testing (development & customer-initiated tests)
Customer performance issues (support)
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7. EVOLUTION

8. ERP SYSTEM EVOLUTION
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9. IFS APPLICATIONS EVOLUTION
Different architectures, more complex, more functionality and more
integrations.
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10. ORACLE EVOLUTION
Easy installation with less configuration
Automatic and self-managed RDBMS
No magic initialization parameters
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11. HARDWARE EVOLUTION
16-bit  32-bit  64-bit technology, Memory KB  TB
Clock frequency has increased from some MHz to several GHz
Low-end servers cover high-end demands
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12. EVOLUTION SUMMARY
Hardware – Low-end servers cover high-end demands
Software – Increased robustness
Architecture complexity – Distributed systems makes troubleshooting harder
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13. CONFIGURATION

14. HARDWARE
CPU
Memory
Computer
performance
Disk
Network
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15. CONFIGURATION
Work load
Connection threads
Server threads
Integration queues
Database processes
Clients
Web server
App server
DB server
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16. TOOLBOX

17. MONITORING
Get an overall picture from the complete system under normal conditions
DB
APP
WEB
PRINT
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OPTIONAL

18. MONITOR
Hardware resources as well as application
Keep historical monitoring data as reference
Specific tools for every part of the system
Database
From overview to detail
Application
server
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System
resources

19. TOOLS
Oracle Enterprise Manager (OEM)
Oracle Workload Repository (AWR)
Free Oracle tools: SQL trace, trcsess, tkprof, Trace Analyzer
3rd party programs: Spotlight, Insider, MyOra
Open Source
In-house admin scripts
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20. METHODOLOGY
Holistic approach
Be open-minded
Don’t be biased—the problem can be the unexpected
Don't change more than one thing at the time
Top-down problem-solving
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21. TOP-DOWN PROBLEM-SOLVING
Problem definition—define not solve
Identify the problem
Trace to source—trail backwards
Is this the root cause of what is generating the problem?
Do the solution have unforeseen consequences?
Don’t assume that problem is solved until verified
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22. TOP-5 PERFORMANCE ISSUES

23. TOP-5 PERFORMANCE ISSUES
Code
Index
Locks
Misconfiguration
Parameters
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24. TOP-5 PERFORMANCE ISSUES
CODE
Non-optimal SQL and PL/SQL code
IN clauses with sub-queries
Loops
Excessive commits
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25. TOP-5 PERFORMANCE ISSUES
CODE
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26. TOP-5 PERFORMANCE ISSUES
INDEX
Queries not using index
Queries using wrong index
Too many indexes on table
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27. TOP-5 PERFORMANCE ISSUES
INDEX
Use the Advanced button
to show which columns
are indexed.
Green arrow = indexed
Red arrow = not indexed
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28. TOP-5 PERFORMANCE ISSUES
INDEX
The Match Case checkbox
can be unchecked if you
don’t know whether capitals
or lower case letters are
used, but…
…the upper() SQL function in
the SQL clause prevents use
of indexes.
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29. TOP-5 PERFORMANCE ISSUES
INDEX
Count of ”Cancelled
historical order
lines”
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30. TOP-5 PERFORMANCE ISSUES
INDEX
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31. TOP-5 PERFORMANCE ISSUES
LOCKS
Hot parts / blocks
Number generation, sequences
Legal demands, non-broken number series
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32. TOP-5 PERFORMANCE ISSUES
LOCKS—HOT PARTS
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33. TOP-5 PERFORMANCE ISSUES
LOCKS—HOT PARTS
1, Purchase
order scenario
3, User load
profile
2, User load
details
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34. TOP-5 PERFORMANCE ISSUES
LOCKS—HOT PARTS
Increasing
user load
Database
Locks
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35. TOP-5 PERFORMANCE ISSUES
LOCKS—HOT PARTS
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36. TOP-5 PERFORMANCE ISSUES
LOCKS—HOT PARTS
Stagnating and
decreasing CPU
usage
Increasing
response time
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37. TOP-5 PERFORMANCE ISSUES
LOCKS—HOT PARTS—COMPARE COLD PARTS
CPU %
Response time
Purchase Orders using 2000 parts total
Purchase Orders using 10 parts total
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38. TOP-5 PERFORMANCE ISSUES
MISCONFIGURATION
Unbalanced configuration
Planning/purchasing new infrastructure
Adding infrastructure
Extreme load profile
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39. TOP-5 PERFORMANCE ISSUES
MISCONFIGURATION
Introducing web server
For DMZ or other
purpose
IFS well working
system
System
change
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40. TOP-5 PERFORMANCE ISSUES
MISCONFIGURATION
Introducing web server
For DMZ or other
purpose
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41. TOP-5 PERFORMANCE ISSUES
MISCONFIGURATION
Loadrunner loadtest 1-200 users
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42. TOP-5 PERFORMANCE ISSUES
MISCONFIGURATION
CPU %
Response time
Original configuration
Changed configuration
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Transactions/sec

43. TOP-5 PERFORMANCE ISSUES
MISCONFIGURATION
Introducing web server
For DMZ or other
purpose
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44. TOP-5 PERFORMANCE ISSUES
MISCONFIGURATION
CPU %
Response time
Original configuration
Changed configuration
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Transactions/sec

45. TOP-5 PERFORMANCE ISSUES—PARAMETERS
shared_pool_size
db_cache_size
sga_max & sga_target
pga_aggregate_target
processes
optimizer_index_cost_adj
undo_retension
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46. TOP-5 PERFORMANCE ISSUES
PARAMETERS—OPTIMIZER_INDEX_COST_ADJ
optimizer_index_cost_adj=10
optimizer_index_cost_adj=1000
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47. SUMMARY

48. SUMMARY
Balance infrastructure against workload
Monitor all components in the system
Have a prepared toolbox
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50. www.IFSWORLD.com
THIS DOCUMENT MAY CONTAIN STATEMENTS OF POSSIBLE FUTURE FUNCTIONALITY FOR IFS’S SOFTWARE PRODUCTS AND
TECHNOLOGY. SUCH STATEMENTS OF FUTURE FUNCTIONALITY ARE FOR INFORMATION PURPOSES ONLY AND SHOULD NOT BE
INTERPRETED AS ANY COMMITMENT OR REPRESENTATION. IFS AND ALL IFS PRODUCT NAMES ARE TRADEMARKS OF IFS. THE NAMES
OF ACTUAL COMPANIES AND PRODUCTS MENTIONED HEREIN MAY BE THE TRADEMARKS OF THEIR RESPECTIVE OWNERS.
© 2013 IFS