Implementation Guide › Performance Tuning › Web Tier Performance › Reduce Traffic between Your Web Agents and the Policy Server › Session Cache (authentication)

Session Cache (authentication)

Each Web Agent uses a session cache to store the authentication information of users whom the Policy Server has already authenticated.

The Web Agent searches the session cache to determine whether a user is authenticated before contacting the Policy Server for authentication. The session cache improves performance by reducing the number of authentication calls to the Policy Server.

The authentication for a user ends when any of the following events occur:

• The user logs out.
• The session associated with a user expires.

Authentication information is removed from the session cache and discarded.