What is the peak authentication rate for the application?
The peak authorization rate is based on the sustained authorization rate, specifically, when and at what rate the system is operating at peak levels. Estimating the peak authorization rate is the process of identifying when the system is servicing the highest level of authorization requests.
When estimating the peak authorization rate, we recommend using the metrics that you gathered when determining the sustained authorization rate to determine:
The following figure is an example of these metrics:
Identifying these metrics helps you to estimate the number of authentication requests, per second, that CA SiteMinder® must service to maintain the peak rate at which users authenticate, which the following represents:
(authorization_load * percentage_of_transactions) / number_of_hours / 3600 = peak_authorization_rate
Note: This rate is based on the single busiest hour. There can be times when the peak authorization rate exceeds the hourly calculation.
Represents the number of daily authorizations for the application.
Represents the percentage of transactions that occur when the system is operating at peak levels.
Represents the number of hours in which the system is operating at peak levels.
Represents the peak authorization rate for the application.
Example: Estimate a Peak Authorization Rate
As detailed in Estimate Daily Authorizations, the portal application has an authorization load of 792,000. System activity reports detail that during the single busiest hour of the day, 260,000 authorization requests occur. This number represents approximately 33 percent of the authorization load.
(792,000 * 0.33) / 1 / 3600 = 72.6 authorizations per second
The portal application has a peak authentication rate of 72.6 authorizations per second.
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