Create Benchmark Factory Import File
All the SQL statements can be saved in a text file from the Job Manager, the Scanned SQL Viewer, the SQL Repository, and the SQL Optimizer windows. These SQL statements can then be imported into Benchmark Factory program (version 4.6 or later).
To create the text file to import into Benchmark Factory
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Right-click and select Create Benchmark Factory Import File.
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Select the specific SQL statements that you want to save. Click OK.
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Enter the filename and select the file location. Click Save.
SQL Repository Functions
Below is a list of available functions within the SQL Repository window.
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Button or Menu |
Function |
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SQL & Right-click Menu
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SQL & Right-click Menu |
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SQL & Right-click Menu
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SQL & Right-click Menu |
Add Folder |
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Right-click Menu |
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Right-click Menu |
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Right-click Menu |
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Right-click Menu |
Index Impact Analyzer
Quest SQL Optimizer for IBM® DB2® LUWmaximizes SQL performance by automating the manual, time-intensive and uncertain process of ensuring that SQL statements are performing as fast as possible. SQL Optimizer analyzes, rewrites, and evaluates SQL statements within multiple database objects, files, or SQL statements captured by the DB2 Event Monitor. With SQL Optimizer, you can analyze and optimize all your problem SQL from multiple sources. SQL Optimizer also provides you a complete index optimization and plan change analysis solution, from index recommendations to simulated index impact analysis, through comparison of multiple SQL access plans.
SQL Optimizer provides you with the following main modules.
SQL Optimizer (including SQL Rewrite and Generate Indexes functions)
About Index Impact Analyzer
The Index Impact Analyzer analyzes the performance impact of new indexes on SQL statements before the indexes are permanently created on your database. New indexes may improve the performance of one SQL but downgrade the performance of several others. The Index Impact Analyzer evaluates the performance effect that given indexes might have on SQL statements, thereby removing the uncertainty associated with index creation.
The Index Impact Analyzer analyzes the performance impact of index creation on SQL statements retrieved from the SQL Repository or the SQL Scanner. To analyze the impact that creating new indexes might have on SQL performance, the proposed indexes are created as virtual indexes on the database. Then new access plans are retrieved showing the impact the new indexes would on the access plans of individual SQL statements. The virtual indexes are dropped after the retrieval of the access plans.
After the analysis is complete, the Index Impact Analyzer provides metrics of the overall performance changes and allows you to identify which SQL statements have changes to access plan with the proposed indexes.