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SQL Optimizer for SAP ASE 3.9.1 - Installation Guide

New Analysis Wizard: Configuration Page

The Configuration page is used to change the database parameters. The query plans for the selected SQL statements are retrieved after the parameters are changed in order to analysis the effect changing database parameters will have on the performance of the SQL statements.

Each set of configuration parameters used in an analysis is called a Scenario. When you create an analysis, you can create one Scenario. Additional Scenarios can be created after the analysis is created.

Item Description

Name

Enter a name for this Scenario.

Description

Enter a description for this Scenario.

Show configuration parameters for

You can narrow the selection of parameters available in the parameter grid by selecting the parameter category from this drop-down list.

Parameter settings grid

Enter the new settings for the parameters you want to analyze and what effect changing them will have on the performance of your SQL statements. This grid displays the parameter name, the default parameter value, the current value, unit of measurement for the parameter and if you must restart the database before the parameter change can take affect. Enter the new parameter setting in the New Value column.

Minimum and Maximum value

Displays the lowest and the highest value that you can enter for the selected parameter.

Monitor Information

Displays the following information. This information is only available for some of the Adaptive Server configuration parameters.

num_free

Amount of scan descriptors, both metadata and auxiliary, which are not currently in use.

num_active

Amount of scan descriptors, both metadata and auxiliary, which are installed in cache and therefore are in use.

pct_act

Percentage of the total number of scan descriptors that are installed in cache and therefore are in use.

Max_Used

Maximum amount of scan descriptors, both metadata and auxiliary, which were in use at any one time since starting the server was started.

Reuse

Number of scan descriptors reused.

Description

Provides an explanation of the function of the selected Adaptive Server configuration parameter.

 

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