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Extended EventsNot so tricky as you might thinkJonathan Allen@fatherjacksqlsouthwest.co.uk
Who on Earth is Jonathan Allen?   Local Government 13 years – accountancy / tax collection.   Systems engineer and DBA s...
Whats coming up• XE - architecture and components.• What can Extended Events show us?• Getting started.• System Health Ext...
Extended Events don’t bite
(Image recreated by Jonathan Allen from MSDN/Books online)
(Image recreated by Jonathan Allen from MSDN/Books online)
(Image recreated by Jonathan Allen from MSDN/Books online)
(Image recreated by Jonathan Allen from MSDN/Books online)
(Image recreated by Jonathan Allen from MSDN/Books online)
(Image recreated by Jonathan Allen from MSDN/Books online)
(Image recreated by Jonathan Allen from MSDN/Books online)
(Image recreated by Jonathan Allen from MSDN/Books online)
(Image recreated by Jonathan Allen from MSDN/Books online)
What can Extended Events show us?From BOL: Troubleshooting excessive CPU usage You are investigating excessive CPU usage o...
Working with Extended EventsOptions• SQL 2008, 2008 R2  – TSQL  – Extended Events Session Explorer• SQL 2012  – TSQL  – SS...
Demos• SSMS 2005/8/R2  – Catching errors  – Identifying slow queries• 2012  – Spotting deprecation issues  – System health...
Demo
XE Best Practice / RecommendationsConsider• Target – Sync or Async• Storage – type, size• Retention – No_Event_Loss or  Al...
Reference• Jonathan Kehayias   –   http://twitter.com/#!/sqlpoolboy / http://www.sqlskills.com   –   http://extendedeventm...
Reference• SQL 2012 SSRS performance reports   –   http://www.microsoft.com/download/en/details.aspx?id=29063• Books Onlin...
Contact me•   Blog – http://www.simple-talk.com/community/blogs/jonathanallen•   SQL forum moderator – http://ask.sqlserve...
Extended events
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Extended events

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My "Extended Events - Not so tricky as you might think" slide deck from SQL Bits X

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Extended events

  1. 1. Extended EventsNot so tricky as you might thinkJonathan Allen@fatherjacksqlsouthwest.co.uk
  2. 2. Who on Earth is Jonathan Allen? Local Government 13 years – accountancy / tax collection. Systems engineer and DBA since 1999 SQL Server 6.5, 7, 2000, 2005 and 2008+R2, 2012 Blog, Twitter, SQL South West user group
  3. 3. Whats coming up• XE - architecture and components.• What can Extended Events show us?• Getting started.• System Health Extended Events session.• Working with XE. – T-SQL. – Extended Events manager SSMS Add-in. – SQL Server 2012 interface.
  4. 4. Extended Events don’t bite
  5. 5. (Image recreated by Jonathan Allen from MSDN/Books online)
  6. 6. (Image recreated by Jonathan Allen from MSDN/Books online)
  7. 7. (Image recreated by Jonathan Allen from MSDN/Books online)
  8. 8. (Image recreated by Jonathan Allen from MSDN/Books online)
  9. 9. (Image recreated by Jonathan Allen from MSDN/Books online)
  10. 10. (Image recreated by Jonathan Allen from MSDN/Books online)
  11. 11. (Image recreated by Jonathan Allen from MSDN/Books online)
  12. 12. (Image recreated by Jonathan Allen from MSDN/Books online)
  13. 13. (Image recreated by Jonathan Allen from MSDN/Books online)
  14. 14. What can Extended Events show us?From BOL: Troubleshooting excessive CPU usage You are investigating excessive CPU usage on your production system. You use various Dynamic Management Views (DMVs) to determine if the CPU usage can be attributed to queries that were run on the system. This examination indicates that most of the queries are ad-hoc user queries. The information obtained from the DMVs is not enough to diagnose the problem. You create an Extended Events session that: • Enables events for statement completion with predicates that specify CPU threshold. • Has an action to only collect the query plan when the event fires. • Writes any data that is collected to a file. This file is on a drive that does not contain any log or database files. After starting the Extended Events session you examine the output and are able to determine that the cause of the CPU problem is a data type conversion between two commonly joined tables.(http://msdn.microsoft.com/en-us/library/bb630354(SQL.100).aspx)
  15. 15. Working with Extended EventsOptions• SQL 2008, 2008 R2 – TSQL – Extended Events Session Explorer• SQL 2012 – TSQL – SSMS (not effective on prev. versions)
  16. 16. Demos• SSMS 2005/8/R2 – Catching errors – Identifying slow queries• 2012 – Spotting deprecation issues – System health session
  17. 17. Demo
  18. 18. XE Best Practice / RecommendationsConsider• Target – Sync or Async• Storage – type, size• Retention – No_Event_Loss or Allow_Single_Event_Loss/Allow_multiple_Event_Loss• Use SSMS 2012 to build session, script it, apply to 2008
  19. 19. Reference• Jonathan Kehayias – http://twitter.com/#!/sqlpoolboy / http://www.sqlskills.com – http://extendedeventmanager.codeplex.com/ – http://sqlblog.com/blogs/jonathan_kehayias/archive/2010/12.aspx• MVP Deep Dives 1 – Chapter 49 by Christian Lefter – via Amazon among other book sellers• SQL Server 2008 Internals and Troubleshooting – (Bolton, Langford, Ozar, Rowland-jones, Wort) via Amazon among other book sellers• Adam Machanic – blog (code generator/tips+advice) – http://sqlblog.com/blogs/adam_machanic/archive/tags/extended+events/default.aspx
  20. 20. Reference• SQL 2012 SSRS performance reports – http://www.microsoft.com/download/en/details.aspx?id=29063• Books Online – 2008 - http://msdn.microsoft.com/en-us/library/bb677357(v=SQL.100).aspx – 2012 - http://msdn.microsoft.com/en-us/library/ms130214(v=sql.110).aspx• MSDN Convert Trace to XE article – http://msdn.microsoft.com/en-us/library/ff878114(v=sql.110).aspx• MSDN Blog – Grant Fritchey – http://blogs.msdn.com/b/microsoft_press/archive/2012/03/21/from-the-mvps-a-gui-for-extended- events-in-sql-server-2012.aspx
  21. 21. Contact me• Blog – http://www.simple-talk.com/community/blogs/jonathanallen• SQL forum moderator – http://ask.sqlservercentral.com• Twitter - @Fatherjack• SQLSouthWest User Group leader – jonathan@sqlsouthwest.co.uk• PASS UK Regional Mentor – http://sqlpass.org / ukrm@sqlpass.org• Friend of Red Gate - http://www.red-gate.com Jonathan Allen © - May 2011

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