2. SQL Tuning made much easier with SQLTXPLAIN (SQLT) Mauro Pagano Senior Principal Technical Support Engineer Oracle Confidential – Internal/Restricted/Highly RestrictedCopyright © 2014, Oracle and/or its affiliates. All rights reserved. |

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4. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Program Agenda Introduction Main Methods Main HTML Diagnostic Report Summary Q&A 1 2 3 4 5 Oracle Confidential – Internal/Restricted/Highly Restricted4

5. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Program Agenda Introduction Main Methods Main HTML Diagnostic Report Summary Q&A 1 2 3 4 5 Oracle Confidential – Internal/Restricted/Highly Restricted5

6. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | What is SQLTXPLAIN (SQLT)? Add-on (available at MOS 215187.1) Free to download and use Works on 12c,11g,10g Linux, UNIX, Windows Single instance, RAC, Exadata, In-Memory Easy to install and execute Tool to diagnose SQL statements performing poorly

7. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | SQLTXPLAIN (SQLT) origins SQL Tuning diagnostics gathering – time consuming and time sensitive manual process – not straightforward, need to know what to extract and how – more info/diag release after release Avoid reinventing the wheel, quickly spot known issues / concerns Several RDBMS features provide insights but often overlooked Why do I need a tool to collect diagnostics?

8. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | SQLTXPLAIN (SQLT) benefits Collect SQL tuning diagnostics for one SQL statement Over a hundred health-checks (HC) around the SQL statement If Oracle Tuning or Diagnostics Pack are properly licensed – Invokes SQL Tuning Advisor (STA) – Includes Active Session History (ASH) and SQL Monitor Report – Includes Automatic Workload Repository (AWR) Automatic SQL tuning test case (TC) extraction SQLT helps to expedite SQL tuning process What is in it for me?

9. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | SQLTXPLAIN (SQLT) mechanics Install once, execute many 3 + 4 main methods to analyze one SQL statement Inputs one SQL statement and outputs one zip file Output contains a main html report and other files – AWR, ADDM, ASH, SQL Mon, 10053, 10046, TKPROF, etc. Exports SQL tuning test cases – SQLT TC and TCX plus 11g Test Case Builder (TCB) SQLT installs its own two schemas, does not pollute the application! How does it work?

10. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Program Agenda Introduction Main Methods Main HTML Diagnostic Report Summary Q&A 1 2 3 4 5 Oracle Confidential – Internal/Restricted/Highly Restricted10

11. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | SQLT Main Methods SQLT XTRACT SQLT XECUTE SQLT XTRXEC SQLT XPLAIN SQLT XTRSBY SQLT XPREXT SQLT XPREXC All 3 + 2 + 2 act on one SQL statement

12. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Using SQLT Main Methods

13. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. |  XTRXEC includes XTRACT and XECUTE XPLAIN XTRSBY Common XTRACT XECUTE SQLT Output Overlap

14. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Program Agenda Introduction Main Methods Main HTML Diagnostic Report Summary Q&A 1 2 3 4 5 Oracle Confidential – Internal/Restricted/Highly Restricted14

15. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | What is included in Main Report? Health-checks SQL text Parameters Cursor sharing SQL Tuning Advisor (STA) report Execution plans Partial list of contents (1/3)

16. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | What is included in Main Report? Plan stability Active Session History (ASH) SQL performance metrics SQL Monitor Segment and session statistics Tables Partial list of contents (2/3)

17. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | What is included in Main Report? Indexes CBO statistics Objects and dependencies Policies Metadata Partial list of contents (3/3)

18. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Navigating the SQLT Main Report 1.SQL Text 2.Plans Summary 3.Observations 4.Branch as per findings Typical Navigation

19. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Demonstration Main Report Navigation SQLT XECUTE

20. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Demonstration

21. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Demonstration

22. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Demonstrantion

23. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Demonstration

24. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Demonstration

25. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Demonstration

26. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Demonstration

27. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Demonstration

28. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Demonstration

29. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Demonstration

30. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Demonstration

31. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Demonstration

32. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Demonstration Same SQL in 12c uses an Adaptive Plan, SQLT helps making it more readable

33. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Demonstration If we want to force this plan in another db we can just grab these hints

34. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Demonstration

35. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Demonstration SQLT provides info about the performance history for the SQL (from AWR)

36. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Demonstration SQLT extract info from ASH to help identify where time was spent

37. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Demonstration

38. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Demonstration

39. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | SQLT Additional Methods COMPARE – Compares everything that surrounds a SQL (object definition, statistics, parameters, execution plan, etc) across two systems XPLORE – Evaluates the impact of every CBO parameter / fix on the execution plan – Automates hundreds on tests in single operation What else can I do with SQLT?

40. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Program Agenda Introduction Main Methods Main HTML Diagnostic Report Summary Q&A 1 2 3 4 5 Oracle Confidential – Internal/Restricted/Highly Restricted40

41. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | SQL Tuning made easier with SQLTXPLAIN Full collection of SQL tuning diagnostics – Consolidated into an easy-to-navigate html report – Consistent view – Allow offline expert analysis Over a hundred health-checks around the SQL statement – Some with pointers to particular notes or bugs Automatic SQL tuning test case (TC) extraction – Allow WHAT-IF evaluations on a test environment Dynamic readme with commands for further diagnostics How is that?

42. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Want to master SQLTXPLAIN? Book: Oracle SQL Tuning with Oracle SQLTXPLAIN  Author: Stelios Charalambides  Released: March 20, 2013  Level: Intermediate  Available  Apress  Amazon  Barnes&Noble

43. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Important Support Resources Discover more about Get Proactive: http://www.oracle.com/goto/proactivesupport MOS Notes: 215187.1 SQLTXPLAIN (SQLT) Tool Download 1454160.1 SQLTXPLAIN (SQLT) FAQ MOS Community: SQLTXPLAIN (SQLT): General Discussion What if I want to know more?

44. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. | Program Agenda Introduction Main Methods Main HTML Diagnostic Report Summary Q&A 1 2 3 4 5 Oracle Confidential – Internal/Restricted/Highly Restricted44

45. Copyright © 2014, Oracle and/or its affiliates. All rights reserved. |Oracle Confidential – Internal/Restricted/Highly Restricted45