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Enabled This enables/disables caching for this policy Duration This is how long (in seconds) to keep items in cache (see note shown next) Check for Changes This enables/disables the cache to be driven by changes in the site, and it makes the cache change based If this is disabled, the cache is flushed based on the duration time set (this makes it time based) The time-based option provides much better performance, but you may experience a lag in content Vary by Custom Parameter This sets the parameters to vary the Cache Policy by, and it also controls how many cached versions of the page should be created based on name/value pairs sent through HTTP POST/GET None means one version (the default), and the * means always pass the name/value pairs to create cached versions of the page (granularity can be controlled by naming parameters, with multiple parameters separated by semicolons) An example could be to vary the settings by current language or region For more information, reference the ASPNET documentation

The Table Analyzer Wizard examines the distribution of data among the tables and presents suggestions and ideas for further improvements The Performance Analyzer looks at any or all of the objects in the database and makes suggestions for improving their performance The Performance Analyzer can also examine the relationships that you ve established in the database and the set of all Visual Basic code modules in the database, including class and standard modules Both of these tools are available on the Database Tools tab s Analyze command group

14:

Part III:

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When you design a new database, you do the best that you can to reduce the redundancy of data by creating a set of related tables If you notice that your database has a table showing repeated values in a field, you can use the Table Analyzer to help you split the table The Table Analyzer can look at the data distribution, and perhaps, make suggestions for additional optimization, including adding more indexes and further normalization To start the Table Analyzer, on the Database Tools tab s Analyze group, click the Analyze Table command The first two dialog boxes provide a good description of the process of table optimization by first describing the problem and then showing possible solutions to the problem Each dialog box also offers a look at examples of the problems and the solutions Figure 17-1 shows the first of the two introductory dialog boxes Click one of the Show Me An Example buttons to get a picture of what the Table Analyzer can do The second Table Analyzer dialog box shows how it plans to solve the problem by splitting tables, so each piece of data is stored only once The third Table Analyzer dialog box shows a list of tables in the current database (see Figure 17-2) Select the table that contains repeated data and click Next In the next dialog box, you can choose to let the wizard decide how to split the data or do it yourself If you let the wizard decide, the next dialog box presents a diagram of the suggested redistribution of information