SQL Server Query Performance Tuning: Performance Monitoring

Create an Extended Events Session

Set up an Extended Events session to capture queries running longer than 2 seconds and analyze the collected data.

Expected output: A session capturing long-running queries with data available for review.

Hint: Use the sql_statement_completed event and filter on duration.

Analyze Top Resource-Consuming Queries

Write a query using DMVs to list the top 10 queries by total logical reads.

Expected output: A list of queries sorted by logical reads descending.

Hint: Use sys.dm_exec_query_stats and join with sys.dm_exec_sql_text.

SQL Server provides SQL Server Profiler, Extended Events, and Dynamic Management Views (DMVs) to monitor query performance and resource usage.

Extended Events is more lightweight and scalable, causing less performance overhead while providing detailed event data compared to SQL Server Profiler.

DMVs provide real-time statistics about query execution, resource consumption, and wait times, enabling identification of expensive queries and bottlenecks.