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Specifying Compilation Time of JSP
Files 
You can use this procedure to configure the Web Container Service behavior concerning compiling JSP files of your web applications into servlet implementation classes. The default is to compile them when they are requested for the very first time. However, you can specify that the container compiles all JSP files that are not already compiled at application startup time. This may improve performance for those clients that first request these JSP pages, but will slow down the process of starting the application.
You can specify when JSP files of your web applications are compiled by editing the CompileOnStartUp property of the Web Container Service. Use the Visual Administrator tool to do it:
1. Open the Properties tab of the Web Container Service.
2. Edit the CompileOnStartUp property. If it is set to true, then JSP files are compiled at application startup time. If set to false, the JSP is compiled the first time it is requested.
3. To add the new value to the list of properties, choose Update.
4.
Choose
(Save Properties) to save your settings.