A web agent maintains a cache of all active sessions involving content that the agent protects. Once an entry is added to an agent's cache, it remains valid for a period of time after which the entry is considered expired and later purged.
The property com.sun.am.policy.am.polling.interval in the web agent AMAgent.properties configuration file determines the number of minutes an entry will remain in the web agent cache. Once the interval specified by this property has elapsed, the entry is dropped from the cache. By default, the expiration time is set to three minutes.