Add awesome stuff about extended events

Author: ktaranov

Extended_Events/README.md

@@ -1,9 +1,24 @@
 # SQL Server Extended Events
+SQL Server Extended Events has a highly scalable and highly configurable architecture that allows users to collect as much or as little information as is necessary to troubleshoot or identify a performance problem.
 
-Source links:
+
+
+Useful links:
  - [Extended Events Microsoft Docs](https://docs.microsoft.com/en-us/sql/relational-databases/extended-events/extended-events)
  - [Find Your Dark Queries](http://michaeljswart.com/2017/04/finding-your-dark-queries/)
  - [Finding Blocked Processes and Deadlocks using SQL Server Extended Events](https://www.brentozar.com/archive/2014/03/extended-events-doesnt-hard/)
  - [What event information can I get by default from SQL Server?](http://dba.stackexchange.com/questions/48052/what-event-information-can-i-get-by-default-from-sql-server)
  - [Understanding the sql_text Action in Extended Events](https://www.sqlskills.com/blogs/jonathan/understanding-the-sql_text-action-in-extended-events/)
  - [Extended Events Series (1 of 31) – An Overview of Extended Events](https://www.sqlskills.com/blogs/jonathan/extended-events-overview/)
+ - [Deep dive into the Extended Events Histogram target](https://www.sqlshack.com/deep-dive-into-the-extended-events-histogram-target/)
+ - [Paul S. Randal articles about extended events](https://www.sqlskills.com/blogs/paul/category/extended-events/)
+ - [Jonathan Kehayias articles about extended events](https://www.sqlskills.com/blogs/jonathan/category/extended-events/)
+ - [Jonathan Kehayias extended 31 day series](https://www.sqlskills.com/blogs/jonathan/category/xevent-a-day-series/)
+ - [Erin Stellato articles about extended events](https://www.sqlskills.com/blogs/erin/category/extended-events/)
+ - [Stairway to SQL Server Extended Events](http://www.sqlservercentral.com/stairway/134867/) (by Erin Stellato)
+ - [Measuring “Observer Overhead” of SQL Trace vs. Extended Events](https://sqlperformance.com/2012/10/sql-trace/observer-overhead-trace-extended-events) (by Jonathan Kehayias)
+
+Courses:
+ - [SQL Server: Introduction to Extended Events](https://www.pluralsight.com/courses/sqlserver-basicxevents) (by Jonathan Kehayias)
+ - [SQL Server: Advanced Extended Events](https://www.pluralsight.com/courses/sqlserver-advanced-xevents) (by Jonathan Kehayias)
+ - [SQL Server: Replacing Profiler with Extended Events](https://www.pluralsight.com/courses/sqlserver-replacing-profiler-extended-events) (by Erin Stellato)