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Performance Load Testing Case Study – Agilent Technologies

Performance Load Testing Case Study – Agilent Technologies. Agenda. Introductions Background Testing Objectives Preparation Phase Execution Phase Analysis Lessons Learnt Contact Information. Introduction. Ramesh Padmanabhan Entegration Software

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Performance Load Testing Case Study – Agilent Technologies

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  1. Performance Load TestingCase Study – Agilent Technologies Entegration Software

  2. Agenda • Introductions • Background • Testing Objectives • Preparation Phase • Execution Phase • Analysis • Lessons Learnt • Contact Information Entegration Software

  3. Introduction • Ramesh Padmanabhan • Entegration Software • Consulting & product company based in San Jose • Proud to be service partners of Oracle Corporation Mercury Interactive Yash Technologies Entegration Software

  4. Introduction • Agilent Technologies • $6 Billion Global Mfg Company • Over 30,000 employees in more than 50 countries • One of the largest global single instance installs of Oracle E-business suite • Consolidated over 150 legacy systems • Expect a maximum 5,000 concurrent users Entegration Software

  5. Background • Largest single instance install • 3 HP Superdomes –Production, Reporting, Planning • Single US based data center • Over 50 operating units • Significant business volume in Asia & Europe • Consolidating over 125 different legacy systems • Implemented all Financial & MFG Modules Entegration Software

  6. Testing Objectives Entegration Software

  7. Testing Objectives • Validate single instance strategy • Validate network and hardware infrastructure • Scalability to 5000 concurrent users • Stress test for “high water mark” • Set user response time expectations • Identify and fix significant performance tuning issues within Oracle Applications • Identify and drive solutions for hardware issues Entegration Software

  8. Preparation Phase Entegration Software

  9. Data Gathering • Identified major transactions within each application module • Questionnaires sent for legacy data volumes by geography (US, Asia, Europe) • Short listed transactions with high volume or data intensive processing • Identified user distribution by region and by application areas • Determined estimation methodology for inquiry transactions Entegration Software

  10. Hardware Preparation • Ensure that the production configuration of back-end server and middle tier machines were set-up and configured • Procure the Load generation agent boxes and have them installed and setup at the right locations • Ensure that the Cisco load balancing router was correctly set up • Set up network ‘sniffing’ devices to get detailed metrics of network traffic Entegration Software

  11. Software Preparation • Procure and install LoadRunner on the agent and controller boxes • Install LoadRunner and the Oracle Applications client on the machines of the scripters • Install/Setup other database monitoring software • Prepare scripts for detailed transaction analysis Entegration Software

  12. Data Preparation • Validated various application setups • Initial cycles required all key master data to be fabricated • Developed numerous scripts to extract key data elements like items, customers, vendors etc. to be used in transactions • Ensured adequate breadth of data. • Identified key data and parameters for background load Entegration Software

  13. Develop LoadRunner Scripts • Recorded scripts for all the critical and high volume transactions • Adequate mix of inquiry and update txns. • Parameterized all the critical pieces of data like item, customer, orders etc. • Identified activities for which server response times were key and set up transaction timers around them e.g. commits, quick-picks etc. Entegration Software

  14. Execution Phase Entegration Software

  15. Build Test Scenarios • Develop matrix for users by geography by transaction • Manual scenarios • Goal oriented scenarios • Transactions split into three groups based on data dependency conditions Entegration Software

  16. Run Tests… • 5 cycles of testing • 1- validation cycle • 2 – complete cycle with converted data • 3- Stress test cycle • 4- Complete integrated test with key interfaces and customizations • 5- Production simulation run • Each cycle comprised of two major runs/day for two weeks. Each test run was about 4-7hrs long Entegration Software

  17. Run Tests… • 5000 concurrent user load generated from 8 LoadRunner agents – 4 in US, 2 each in Europe & Asia • LoadRunner monitors set up for network, backend server & middle-tier boxes • Dedicated DBA and performance tuning experts monitored the HP Superdome server Entegration Software

  18. Analysis • Used LoadRunner Analysis tool • Real time graphical interface to monitor the test progress • Post run analysis includes numerous graphs and transaction timers • More detailed analysis was done from the result data stored by LoadRunner in an Access database Entegration Software

  19. Analysis • Data from the analysis used to • Set up realistic response time expectations from the end users • Modify various database parameters in the init.ora to better performance • Tweak settings of the Cisco load balancer for middle tier machines • Identify and tune some of the application code that had bad performance Entegration Software

  20. Limitations • Some performance intensive processes could not be tested due to data dependency issues e.g. lock-box receipts • Some dynamic and interactive processes could not be tested very well e.g. configured orders • Some custom code not stable till the last cycle • Some of the newer application modules not stable for a reasonable test • Application version and patch set lags Entegration Software

  21. Lessons Learnt • Performance test will only be as good as the data collected in the analysis phase • While performance test can significantly reduce risk of poor performance, it is not a guaranty • Initial performance testing cycles should focus more on non-code related performance variables Entegration Software

  22. Lessons Learnt • Intensive code related performance testing & tuning should take place after custom solutions have been put into testing and application patch sets are frozen • Performance testing should be in the critical path of project plan and performance testing instances should be patched just like the BST instances • Should plan on at least one marathon testing run that extends for 3 or 4 days Entegration Software

  23. Contact Information Ramesh Padmanabhan Entegration Software rpadmanabhan@entegration.com 408-674-3701 www.entegration.com Entegration Software

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