HP recommends that you run AUTOGEN in the following circumstances: o During a new installation or upgrade. o Whenever your work load changes significantly. o When you add an optional (layered) software product. Certain layered products might require you to execute AUTOGEN to adjust parameter values and page and swap file sizes. (For information about using AUTOGEN to modify page and swap files, refer to the chapter on managing page, swap, and dump files in the HP OpenVMS System Manager's Manual.) Refer to specific product documentation for installation requirements. o When you install images with the /SHARED attribute. The GBLSECTIONS and GBLPAGES parameters might need to be increased to accommodate additional use of global pages and global sections. o During normal operation, as part of a batch-oriented command procedure that runs AUTOGEN on a regular basis and automatically sends a report to an appropriate Mail account. The recommended procedure is described in the chapter on managing system parameters in the HP OpenVMS System Manager's Manual. After a new operating system installation or upgrade, examine the results of calculations that AUTOGEN made to determine whether AUTOGEN has set system parameter values that are appropriate for your workload requirements.