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Estimate a Sustained Authorization Rate

What is the sustained authorization rate for the application?

The sustained authorization rate is based on the authorization load, specifically, when and at what rate the authorizations occur. The chance that the authorization load is uniformly spread across your business day is unlikely. Rather, the rate at which requests occur fluctuates, remaining between the lowest and highest (peak) levels for a sustained period. Estimating the sustained authorization rate is the process of identifying a sustained period during which the system is servicing an average amount of authorization requests.

When estimating a sustained authorization rate, we recommend that you use the daily authorization load to determine:

The following figure is an example of these metrics:

Graphical representation of a sustained authorization rate

Identifying these metrics helps you to estimate the number of authorization requests, per second, that SiteMinder must service to maintain the average rate at which authorization requests occur, which the following represents:

(authorization_load * percentage_of_authorization_requests) / number_sustained_hours / 3600 = sustained_authorization_rate

Example: Estimate a Sustained Authorization Rate

As detailed in Estimate Daily Authorizations, the portal application has an authorization load of 792,000. The application portal is available to customers 24 hours a day, seven days a week. Using system activity reports to break down a typical day results in the following metrics:

(762,000 * 0.47) / 5 / 3600 = 19.90 authorizations per second

The portal application has a sustained authorization rate of 19.90 authorizations per second.


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