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Discover effective methods to find the execution time of all views and stored procedures in Oracle SQL Developer for performance tuning purposes.
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Understanding Execution Time Measurement in Oracle SQL Developer

When utilizing Oracle SQL Developer for your database management, it can be essential to accurately measure the performance of your views and stored procedures. A common scenario is the need to understand how long these components really take to execute, especially when you're observing discrepancies between expected and actual performance.

Whether you're tuning queries for better efficiency or just trying to gain insights into the database performance, knowing the execution time can help pinpoint areas for improvement. In this guide, we'll explore how to effectively find the execution time of all views and stored procedures within the Oracle 19c database environment.

The Challenge

As you've likely encountered, when executing SQL statements such as SELECT * FROM view;, you might notice that the execution time seems unusually low. This is often because results are fetched from cache memory instead of performing a full computation. Thus, the recorded time does not reflect the actual performance of the view in a real-world scenario.

The need arises to get accurate execution times to:

Improve overall database performance

Identify slow-performing queries

Optimize your SQL for better resource management

Finding Execution Time in Oracle SQL Developer

1. Using SQL History Pane

Oracle SQL Developer provides an accessible way to view execution times for each query executed. As you write and run your SQL commands, you can refer to the SQL History pane:

Locate the SQL History in your SQL Developer environment.

Find your executed queries along with their respective execution times.

2. Instance Viewer for Real-Time Monitoring

For a broader view of your database performance metrics, you can use the Instance Viewer feature within the DBA tools:

Open the Instance Viewer in Oracle SQL Developer.

Monitor the top SQL performance across your entire database instance.

This will give insights into the most resource-intensive queries.

3. SQL Tuning Advisor

Furthermore, if you want to tune individual SQL statements efficiently, consider using the SQL Tuning Advisor:

Access the SQL Tuning Advisor through the Oracle SQL Developer menu.

Input the specific SQL queries that you believe need optimization.

Receive tailored recommendations based on the performance of those queries.

4. Analyzing AWR Reports

For more detailed and system-level performance insights, the AWR Report (Automatic Workload Repository Report) is invaluable:

AWR reports can be accessed through the DBA tools in SQL Developer.

Keep in mind that generating these reports requires a license for the Diagnostics Pack.

These reports provide comprehensive execution statistics of poorly performing SQL queries along with upgrading tips and system-level recommendations.

Conclusion

Understanding the execution time of views and stored procedures in Oracle SQL Developer is essential for database performance tuning. By utilizing tools like the SQL History pane, Instance Viewer, SQL Tuning Advisor, and AWR reports, database administrators can effectively gauge performance and make informed optimizations.

These resources not only aid in identifying slow queries but also enhance the overall performance and efficiency of your database environment.

Whether you are just starting with Oracle SQL Developer or looking to delve deeper into performance tuning, these methods will equip you with the necessary insights to improve user experience and resource utilization within your database systems.

Happy tuning!