ASP.NET PDF Viewer using C#, VB/NET

You can invoke any of the management advisors through the OEM interface, using various wizards like the SQL Access Advisor Wizard, and this is my suggested way to use any of the advisors. However, there are times when you may need to invoke an advisor programmatically, in which case you

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For machine-wide redirections, you must modify a file named machineconfig, which can be found in the directory %frameworkdir%\%frameworkversion%\config, where %framewrokdir% and %frameworkversion% should be replaced with the content of the environment variables frameworkdir and frameworkversion If you have implemented a NET assembly that is used by many applications, you will likely prefer version redirections via publisher policy assemblies over application configuration files and machine-wide configurations Both application and machine configurations would require modifications of configuration files on each of the client machines To simplify versioning of libraries, a library developer can deploy two assemblies: the new version of the library, and an assembly that explicitly states that the new version is backward compatible with a set of older versions of the library Such an assembly is called a publisher policy assembly.

can use the DBMS_ADVISOR package to manage modules in the advisory framework. The methods for creating a task, adjusting task parameters, performing the analysis, and reviewing the recommendations are common to all the advisors.

These are the steps you must follow to use the DBMS_ADVISOR package to manage various advisors: 1. Create a task. 2. Set the task parameters. 3. Generate the recommendations. 4. Review the advisor s recommendations. I describe these steps in detail in the following sections.

The navigation window evolved over quite a long period of time. There were many instances where the script was being run by multiple users at the same time that changes were being made to the code. To keep existing users up-to-date with the current configuration values, the expanding list of configuration options needed to be checked against each user s personal configuration file. Options not present in the user s file had to be added using the default entries. The following code starts a for loop that iterates through the possible configuration entries, some of which may need to be added to the user s configuration file:

The first step in using an advisor is creating a task. A task is where the advisor stores all its recommendation-related information. You create a task using the CREATE_TASK procedure, as shown here: SQL> VARIABLE task_id NUMBER; SQL> VARIABLE task_name VARCHAR2(255); SQL> EXECUTE DBMS_ADVISOR.CREATE_TASK ('SQL Access Advisor', :task_id, :task_name);

After you create a new task, the next step is to set the parameters for this task. The task parameters control the recommendation process. The parameters that you can modify belong to four groups: workload filtering, task configuration, schema attributes, and recommendation options. Here is an example showing how you can set various task parameters using the SET_TASK_ PARAMETER procedure: SQL> EXECUTE DBMS_ADVISOR.SET_TASK_PARAMETER ( 'TEST_TASK', 'VALID_TABLE_LIST', 'SH.SALES, SH.CUSTOMERS'); In this example, the VALID_TABLE_LIST parameter belongs to the workload-filtering group of parameters. You are instructing the advisor (the SQL Access Advisor) to exclude all tables from the analysis except the sales and customers tables from the SH schema. The following example uses the STORAGE_CHANGE parameter from the recommendation-options group to add 100MB of space to the recommendations. SQL> EXECUTE DBMS_ADVISOR.SET_TASK_PARAMETER('TEST_TASK', 'STORAGE_CHANGE', 100000000);

To generate a set of recommendations by any advisor, you execute the task that you created earlier, using the EXECUTE_TASK procedure of the DBMS_ADVISOR package. The EXECUTE_TASK procedure will generate recommendations, which consist of one or more actions. For example, executing the SQL Access Advisor may provide a recommendation to create a materialized view and a materialized view log. Here s how you execute a task named TEST_TASK: SQL> EXECUTE DBMS_ADVISOR.EXECUTE_TASK('TEST_TASK');

You can view the recommendations made by a certain task by using the GET_TASK_REPORT procedure. You can also use the DBA_ADVISOR_RECOMMENDATIONS view to check the recommendations related to a particular advisor task name: SQL> SELECT rec_id, rank, benefit FROM DBA_ADVISOR_RECOMMENDATIONS WHERE task_name = 'TEST_TASK'; REC_ID RANK BENEFIT ---------- ---------- -----------1 2 2754 2 3 1222 3 1 5499 4 4 594 In this example, the RANK column shows how the four recommendations stack up against each other. The BENEFIT column shows the decrease in the execution cost for each of the four recommendations.