Monday, June 24, 2024

Database: Query Store

Database: Query Store

Database: Query Store

The Query Store is a feature in Microsoft SQL Server that helps database administrators to track query performance over time. It stores execution plans and runtime statistics, making it easier to identify and troubleshoot performance issues.

Here is an example of how to enable Query Store:

ALTER DATABASE [YourDatabaseName] SET QUERY_STORE = ON;

Once Query Store is enabled, you can use the following query to get the top 10 most resource-intensive queries:

SELECT TOP 10 * FROM sys.query_store_runtime_stats ORDER BY avg_duration DESC;

Common use cases for Query Store include:

  • Identifying and fixing poorly performing queries
  • Monitoring query performance over time
  • Comparing query plans before and after index changes

Understanding Query Store is crucial for database administrators preparing for interviews. Employers often ask questions about query optimization and performance tuning, making knowledge of Query Store a valuable skill.

Overall, Query Store is a powerful tool for improving database performance and troubleshooting query-related issues. By utilizing its features, database administrators can optimize query performance and enhance overall system efficiency.

Tags:

Database, Query Store, SQL Server, Performance Tuning

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