The RESOURCE_DURATION_SECONDS column stores the total number of seconds that a user spends at a site during an HTTP session. Each site visit in the session is measured between the first HTTP request of a site visit and one of the following events.
The user visits another site.
The user logs out of the site and the HTTP session ends.
The last HTTP request occurs before the session times out.
The following diagram shows the individual site visits that total the duration in RESOURCE_DURATION_SECONDS.
