Implementation Guide › Performance Tuning › Data Tier Performance › User Store Capacity Planning › How to Estimate a Sustained User Directory Search Rate › Use Authorization Guidelines to Estimate Directory Searches › Case 2: Responses and User Directory Searches

Case 2: Responses and User Directory Searches

A company has enabled three policies to protect their portal application, two of which are bound to responses that return user attributes:

• Policy A returns one user attribute when it fires.
• Policy B returns two user attributes when it fires.
• Policies C is not bound to responses that return user attributes.

The company uses the following to estimate the number of user directory requests that the Policy Server makes to resolve responses that return user attributes:

authorization_load * percent_of_policies * number_of_responses= daily_authorization_requests

• authorization_load

  Specifies the number of daily authorizations for the application.

• percent_of_policies

  Specifies the number of enabled policies, represented as a percentage, that result in the same number of user directory requests because of responses returning user attributes.

  Note: The total percentage must equal 100 percent.

• number_of_responses

  Specifies the number of responses bound to the SiteMinder policy.

• daily_authorization_requests

  Specifies the number of user directory requests to service the authorization request.

Result:

• Policy A—792,000 * 0.2 x 1= 158,000
• Policy B—792,000 * 0.2 x 2= 316,800
• Policies C—792,000 * 0.6 x 0= 0
• Total user directory request—158,000 + 316,800 + 0= 526,000

The company uses this estimate to determine the total number of user directory requests required to service the daily authorization load.