Troubleshooter´s Top 5: Real-world performance tuning of IFS Applications
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The document outlines top performance tuning issues and methodologies for IFS applications, emphasizing the importance of holistic approaches and systematic problem-solving. It identifies five critical performance issues including code optimization, indexing strategies, lock management, misconfiguration risks, and parameter adjustments. Additionally, it highlights the evolution of IFS technology, hardware, and software requirements over time.
Troubleshooter´s Top 5: Real-world performance tuning of IFS Applications
- 2. © 2013 IFS
- 3. REAL-WORLD PERFORMANCE Troubleshooters Top 5—Real-world performance tuning of IFS Applications 3 © 2013 IFS
- 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 5 © 2013 IFS
- 6. WHAT WE DO IFS BENCHMARK TEAM Sizing of IFS Applications (IFS Sizing Guides) Performance testing (development & customer-initiated tests) Customer performance issues (support) 6 © 2013 IFS
- 7. EVOLUTION
- 8. ERP SYSTEM EVOLUTION 8 © 2013 IFS
- 9. IFS APPLICATIONS EVOLUTION Different architectures, more complex, more functionality and more integrations. 9 © 2013 IFS
- 10. ORACLE EVOLUTION Easy installation with less configuration Automatic and self-managed RDBMS No magic initialization parameters 10 © 2013 IFS
- 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 11 © 2013 IFS
- 12. EVOLUTION SUMMARY Hardware – Low-end servers cover high-end demands Software – Increased robustness Architecture complexity – Distributed systems makes troubleshooting harder 12 © 2013 IFS
- 13. CONFIGURATION
- 15. CONFIGURATION Work load Connection threads Server threads Integration queues Database processes Clients Web server App server DB server 15 © 2013 IFS
- 16. TOOLBOX
- 17. MONITORING Get an overall picture from the complete system under normal conditions DB APP WEB PRINT 17 © 2013 IFS 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 18 © 2013 IFS 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 19 © 2013 IFS
- 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 20 © 2013 IFS
- 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 21 © 2013 IFS
- 24. TOP-5 PERFORMANCE ISSUES CODE Non-optimal SQL and PL/SQL code IN clauses with sub-queries Loops Excessive commits 24 © 2013 IFS
- 25. TOP-5 PERFORMANCE ISSUES CODE 25 © 2013 IFS
- 26. TOP-5 PERFORMANCE ISSUES INDEX Queries not using index Queries using wrong index Too many indexes on table 26 © 2013 IFS
- 27. TOP-5 PERFORMANCE ISSUES INDEX Use the Advanced button to show which columns are indexed. Green arrow = indexed Red arrow = not indexed 27 © 2013 IFS
- 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. 28 © 2013 IFS
- 29. TOP-5 PERFORMANCE ISSUES INDEX Count of ”Cancelled historical order lines” 29 © 2013 IFS
- 30. TOP-5 PERFORMANCE ISSUES INDEX 30 © 2013 IFS
- 31. TOP-5 PERFORMANCE ISSUES LOCKS Hot parts / blocks Number generation, sequences Legal demands, non-broken number series 31 © 2013 IFS
- 32. TOP-5 PERFORMANCE ISSUES LOCKS—HOT PARTS 32 © 2013 IFS
- 33. TOP-5 PERFORMANCE ISSUES LOCKS—HOT PARTS 1, Purchase order scenario 3, User load profile 2, User load details 33 © 2013 IFS
- 34. TOP-5 PERFORMANCE ISSUES LOCKS—HOT PARTS Increasing user load Database Locks 34 © 2013 IFS
- 35. TOP-5 PERFORMANCE ISSUES LOCKS—HOT PARTS 35 © 2013 IFS
- 36. TOP-5 PERFORMANCE ISSUES LOCKS—HOT PARTS Stagnating and decreasing CPU usage Increasing response time 36 © 2013 IFS
- 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 37 © 2013 IFS
- 38. TOP-5 PERFORMANCE ISSUES MISCONFIGURATION Unbalanced configuration Planning/purchasing new infrastructure Adding infrastructure Extreme load profile 38 © 2013 IFS
- 39. TOP-5 PERFORMANCE ISSUES MISCONFIGURATION Introducing web server For DMZ or other purpose IFS well working system System change 39 © 2013 IFS
- 40. TOP-5 PERFORMANCE ISSUES MISCONFIGURATION Introducing web server For DMZ or other purpose 40 © 2013 IFS
- 41. TOP-5 PERFORMANCE ISSUES MISCONFIGURATION Loadrunner loadtest 1-200 users 41 © 2013 IFS
- 42. TOP-5 PERFORMANCE ISSUES MISCONFIGURATION CPU % Response time Original configuration Changed configuration 42 © 2013 IFS Transactions/sec
- 43. TOP-5 PERFORMANCE ISSUES MISCONFIGURATION Introducing web server For DMZ or other purpose 43 © 2013 IFS
- 44. TOP-5 PERFORMANCE ISSUES MISCONFIGURATION CPU % Response time Original configuration Changed configuration 44 © 2013 IFS 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 45 © 2013 IFS
- 47. SUMMARY
- 48. SUMMARY Balance infrastructure against workload Monitor all components in the system Have a prepared toolbox 48 © 2013 IFS
- 49. 49 © 2013 IFS
- 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