http://blogs.msdn.com/sql_service_broker/archive/2008/06/26/service-broker-periodic-tasks.aspxSSB receives notifications every 5 seconds from the SQL engine's timer framework. SSB in turn counts these notifications and performs its various periodic maintenance tasks at different intervals. Tasks performed every notification: 1. Internal activationen-USCommunityServer 2.1 SP1 (Build: 61025.2)