1. Modelling a Complex Batch Schedule in PeopleSoft David Kurtz Go-Faster Consultancy Ltd. david.kurtz@go-faster.co.uk www.go-faster.co.uk

2. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 2 Oracle Database Specialist –Independent consultant Performance tuning –PeopleSoft ERP –Oracle RDBMS Book –www.psftdba.comwww.psftdba.com UKOUG Director Server Tech & PeopleSoft Oak Table Who Am I?

3. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 3 Agenda Process Scheduler Priorities –Process Definition –Server Category Queuing in the Process Scheduler Modelling Process Scheduler behaviour

4. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 4 Meet my PeopleSoft system Lots of batch process run ad-hoc by users during the peak day. So many batch processes that there is a often a queue. Number of concurrent processes limited to prevent overload of CPU and Memory

5. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 5 Two business Tasks Completion of task A is more important to the business than task B. –Each task comprises on-line activity and more than one process on Process Scheduler Users do task A in the morning. They are supposed to task B in the afternoon. But they start task B as soon as they complete task A Users who start task B in the morning impede users who are still doing task A

6. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 6 Task B (yellow) displaces Task A (blue)

7. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 7 Suggestion In the mind of the business there is a hierarchy of processing. The hierarchy should be reflected in the configuration and behaviour of the Process Scheduler. If there is a queue on the Process Scheduler –Execute Task A processes in preference to Task B processes.

8. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 8 Process Priority

9. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 9 Server Category Priority

10. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 10 Define More Priorities

11. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 11 Testing Priorities Create a queue of processes on the Process Scheduler –Needs processes that run for a period of time –The dont need to do anything, just stay in status processing for a while

12. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 12 Java Sleep in AE Local JavaObject &Obj; Local ProcessRequest &RQST; MessageBox(0, "", 0, 0, "Sleep Begin for " | GFC_SLEEP_AET.DURATION.Value | " seconds "); &Obj = CreateJavaObject("java.lang.Thread"); &Obj.start(); &Obj.sleep(GFC_SLEEP_AET.DURATION.Value * 1000); MessageBox(0, "", 0, 0, "Sleep END");

13. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 13 Java Sleep in AE Sleep step in AE_SLEEP Various process AE_SLEEP1 … n Process definitions –Different priorities & categories Table GFC_SLEEP_RUN –specifies processes to run –AE_SLEEP_RUN submits processes

14. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 14 Create Test Run Run Offset Control PRCSNAME RUNDTTM Amount DURATION -------- ------------ -------- ------ ----------- 1 AE_SLEEP1 5 175 2 AE_SLEEP2 10 175 3 AE_SLEEP3 15 175 4 AE_SLEEP4 20 175 5 AE_SLEEP5 25 175 6 AE_SLEEP6 30 175 7 AE_SLEEP7 35 175 8 AE_SLEEP8 40 175 9 AE_SLEEP9 45 175

15. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 15 Process Priority Quirk Row PRCS # SYSDATE INSTANCE PRCSNAME RUNDTTM BEGINDTTM ENDDTTM --- --------- -------- ------------ -------- --------- -------- 1 13:14:17 4583 AE_SLEEP1 13:03:27 13:03:55 13:07:08 2 13:14:17 4584 AE_SLEEP2 13:03:32 13:03:55 13:07:08 3 13:14:17 4585 AE_SLEEP3 13:03:37 13:03:55 13:07:08 4 13:14:17 4591 AE_SLEEP9 13:04:07 13:07:12 13:10:27 5 13:14:17 4587 AE_SLEEP5 13:03:47 13:07:13 13:10:27 6 13:14:17 4588 AE_SLEEP6 13:03:52 13:07:13 13:10:27 7 13:14:17 4586 AE_SLEEP4 13:03:42 13:10:31 13:13:46 8 13:14:17 4589 AE_SLEEP7 13:03:57 13:10:47 13:14:01 9 13:14:17 4590 AE_SLEEP8 13:04:02 13:10:47 13:14:01

16. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 16 Process Priority Quirk Delivered Priorities sometimes processed before custom added Priorities Not explicable from SQL submitted by Process Scheduler –Something in logic in program Process Categories process correctly

17. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 17 Process Categories Row PRCS PRCS SERVER RUN # INSTANCE PRCSNAME PRTY RUNDTTM BEGINDTT ENDDTTM ASSIGN STATUS PRCSCATEGORY --- -------- --------- ---- -------- -------- -------- ------ ------ ------------ 1 4740 AE_SLEEP5 5 19:25:10 19:25:23 19:28:23 PSNT 9 Default 2 4741 AE_SLEEP5 5 19:25:13 19:25:39 19:28:38 PSNT 9 Default 3 4742 AE_SLEEP5 5 19:25:16 19:25:39 19:28:38 PSNT 9 Default 4 4748 AE_SLEEP7 7 19:26:52 19:28:41 19:31:41 PSNT 9 Priority 7 5 4749 AE_SLEEP7 7 19:26:57 19:28:58 19:31:56 PSNT 9 Priority 7 6 4747 AE_SLEEP6 6 19:26:37 19:28:58 19:31:56 PSNT 9 Priority 6 7 4746 AE_SLEEP6 6 19:26:42 19:32:00 19:34:59 PSNT 9 Priority 6 8 4743 AE_SLEEP5 5 19:25:19 19:32:16 19:35:15 PSNT 9 Default 9 4744 AE_SLEEP5 5 19:25:22 19:32:16 19:35:16 PSNT 9 Default 10 4745 AE_SLEEP5 5 19:25:25 19:35:02 19:37:59 PSNT 9 Default

18. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 18 Priorities You can use all 9 priorities on Server Categories You can only use priories 1, 5, 9 on Process Definition Server Category Priority takes precedence over Category Priority –So now have 27 priorities instead of 9.

19. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 19 What happens if I change… Maximum number of concurrent processes. Process priorities and process category priorities. Process execution durations, possibly caused by changes to hardware. Increase in number of batch processes.

20. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 20 Create a Model Take what actually happened in production –Process Scheduler Request Table –Batch Timings Table Run Times Map processes to AE_SLEEP_n processes Create contents of GFC_SLEEP_RUN –Now can run processes that run at and for the same time as in production.

21. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 21 Linked Processing Model schedules each process at a given time. –operator runs a process, –Waits for it to begin and complete, –does some work, –Runs another process. What happens if first process completes more quickly?

22. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 22 Linked Processing Next process for same operator scheduled a fixed time after previous process completes. –One AE_SLEEP_n process schedules next process for same operator just before it completes. –Determine links between processes and put into AE_SLEEP_RC

23. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 23 Testing the Model Simulate production without any changes –Needed to subtract 2 seconds from run time to be AE_SLEEP_n run for the requested duration Fixed overhead of AE –Needed fudge factor – added 5 seconds to every process to make model look like production. Overhead of posting etc.

24. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 24

25. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 25 Predict Effect of Changes Make changes –Process and Category Priorities –Rerun the test

26. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 26

27. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 27 Actual Effect in Production

28. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 28 Conclusion Server Category Priority takes precedence over Process Priority. Extra priorities work in Server Categories Model accurately predicted behaviour in production. We encountered counter-intuitive behaviour that we did not predict. –Set expectations for users.

29. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 29 Acknowledgements Andy Mason –Business-Integrations –Java Sleep Utility –Test harness concept

30. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 30 Further Reading Process Scheduler Priority –http://blog.psftdba.com/2011/03/more-process- priority-levels-for.htmlhttp://blog.psftdba.com/2011/03/more-process- priority-levels-for.html Batch Modeller –http://www.go- faster.co.uk/docs.htm#BatchModel.pdfhttp://www.go- faster.co.uk/docs.htm#BatchModel.pdf

31. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 31 Conclusion

32. Questions?

33. Modelling a Complex Batch Schedule in PeopleSoft ©2011 www.go-faster.co.uk 33 Conclusion