1. EOH: A Microsoft Partner INTRODUCTION TO EXTENDED EVENTS

2. www.eoh.co.za What is XE  Extended Events: – Replacement for SQL Profiler (Deprecated) – XE features on all editions  Event handling framework for systems  Used for diagnostics, tracing and auditing  XE combines information from SQL Server and OS

3. www.eoh.co.za XE Architecture – Courtesy BOL

4. www.eoh.co.za  Packages Parent container contained attributes of events within the package Three Types – Package0 – SQLServer – SQLOS – 1 Internal XE Components

5. www.eoh.co.za  Events Two Categories – 4 Channels (Grouping of Events) – Keyword (Specific) Defined point in task XE Components

6. www.eoh.co.za  Targets Consume events & output event data Six target types – File – Histogram – Counter – Pairing – ETW – Ring Buffer XE Components

7. www.eoh.co.za  Actions Response\s to an event. All actions are SYNC. Collects object details from EVENT. – TSQL capture\ Plan handle\ Numa ID etc. Certain events can have unique actions. XE Components

8. www.eoh.co.za  Predicates Boolean expressions that have a failure on first false evaluation. Applied per event not per session. Order of predicates can affect performance. Rich evaluation and filtering contexts XE Components

9. www.eoh.co.za GLOBAL EVENT SESSION DATA  sys.server_event_sessions  sys.server_event_session_target  sys.server_event_session_fields  sys.server_event_session_actions  sys.server_event_session_events Metadata – System Views

10. www.eoh.co.za EVENT SYSTEM DATA  sys.dm_xe_packages  sys.dm_xe_objects  sys.dm_xe_object_columns  sys.dm_xe_map_values Metadata - DMVs

11. www.eoh.co.za ACTIVE SESSION DATA  sys.dm_xe_sessions  sys.dm_xe_session_targets  sys.dm_xe_events  sys.dm_xe_event_actions Meta Data - DMVs

12. www.eoh.co.za Querying XE system Tables And DMVs DEMO

13. www.eoh.co.za  CREATE EVENT SESSION…ON SERVER  ALTER EVENT SESSION…ON SERVER  DROP EVENT SESSION…ON SERVER  COMMON OPTIONS: – MAX_DISPATCH_LATENCY – MAX_MEMORY – STARTUP_STATE – EVENT_RETENTION_MODE SINGLE MULTIPLE NONE XE DDL

14. www.eoh.co.za XE DDL DEMO

15. www.eoh.co.za  Real-time amendment of events and predicates.  SSMS GUI interface.  Different stores for output.  Event correlation available.  Profiler Deprecated (Repeat )  Less Overhead. SQL Trace vs XE

16. www.eoh.co.za  sys.trace_xe_event_map  sys.trace_xe_action_map  sp_BlitzTrace Migrating Profiler to XE

17. www.eoh.co.za  Deadlocks  Page splits – fill factor  Auditing – Internal Use only  CPU and IO tracking  Wait stats  Queries by duration  General troubleshooting Use Case Scenarios

18. www.eoh.co.za USE CASES DEMO

19. www.eoh.co.za  Additional XE objects added.  Live data view.  GUI interface. Aggregation and filtering in UI New session wizard Create new session Templates View Target Data Customizing View Live Data watch Enhancements in SQL 2012\4

20. www.eoh.co.za SSMS XE GUI DEMO

21. www.eoh.co.za  Pair Matching considerations.  Partitioning nodes.  Predicates.  Use the MAX option to control overhead.  Use sampling to minimize result sets. Best Practices & Considerations

22. www.eoh.co.za  Idera XE Profiler https://www.idera.com/productssolutions/freetools  sp_BlitzTrace – Brent Ozar http://www.brentozar.com/extendedevents  Jonathan Kehayias – SQLSkills XE SSMS 2008 Add-In (codeplex) Deep Dive Blogs (msdn & sqlskills.com)  Mike Wachel – MSFT XE Engine developer http://blogs.msdn.com/b/extended_events/  XTrace (WinSDK) Tools for OS\SQL\APP debug Useful Resources

23. www.eoh.co.za  Donovan White  Email: Donovan.White@eoh.co.za  Twitter:@SQLSoup Questions & Answers