> ### Planning an application performance review

> As a matter of good practice, the system administrator at XYZ Corporation is always on the watch for ways to improve his application's performance. With a high volume of data entry taking place between 9 a.m. and 6 p.m. on the system he supports, and most of the procedures distributed and run remotely on an AppServer, his users expect a consistently high level of application performance and availability. He has learned over time how to deliver system availability that is consistent with this goal.

> He has come to learn that his application's performance depends on the effectiveness of four key elements:

> - The application's integrity.
> - The application's efficiency.
> - The database and servers responsiveness.
> - The network's responsiveness.

> Of course, he might consider other technological elements, but these three remain of primary concern. He is most concerned with Fathom performance indicators that relate to these elements so that he can act on any potential performance issue before it affects his users and their ability to perform their jobs.

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