The document summarizes topics that were covered in an SQL community meeting in December 2018, including tuning queries for performance, understanding execution plans, using performance monitoring tools, and troubleshooting queries. Key areas discussed were the SQL query processing steps, factors that affect performance like the buffer cache hit ratio, and methods for analyzing execution plans and data access operators like table scans and index seeks.

1. SQL Community Meeting | December 2018

2. Tuning Process
Performance Monitor Tool
SQL Query Processing Steps
Understanding Execution Plans
SET STATISTICS TIME and SET STATISTICS IO
Data Access Operators
Troubleshooting Queries

3. Factors That Effect Performance
Performance Baseline
Areas of High Concern
Performance Destroyers

5. SQL Server: Buffer Manager: Buffer cache hit ratio
SQLServer: Buffer Manager: Page life expectancy
SQLServer: SQL Statistics: Batch Requests/Sec
SQLServer: SQL Statistics: SQL Compilations/Sec
SQLServer: SQL Statistics: SQL Re-Compilations/Sec
SQLServer: General Statistics: User Connections
SQLServer: Locks: Lock Waits / Sec: _Total
SQLServer: Access Methods: Page Splits / Sec
SQLServer: General Statistic: Processes Block
SQLServer: Buffer Manager: Checkpoint Pages / Sec

6. Performance Monitor

8. Logical and Data Flow
Estimated and Actual Plans
Execution Plan Reuse
Execution Plan Formats
Graphical Execution Plans
Reading Execution Plans

11. Text (scheduled to be
deprecated)
Graphical
XML

12. Estimated VS Actual Execution Plans
XML Execution Plans

18. Viewing a Non-Trivial Execution Plan

20. SET STATISTICS TIME and SET STATISTICS IO

21. Table Scan
Clustered Index Scan
Nonclustered Index Scan
Clustered Index Seek
Key Lookup

27. Data Access Operators

28. SQL Trace
Data Management Views (DMVs) Data Management
Functions (DMFs)
Extended Events
The Data Collector

29. About DMVs and DMFs
sys.dm_exec_requests and sys.dm_exec_sessions
sys.dm_query_stats

31. Data Management Views (DMVs)