http://blogs.technet.com/msfss_stuff/archive/2009/05/12/engine-definition-creep-and-it-s-effect-on-your-server.aspxThe Latest “common” issue we have been experiencing with Microsoft Antigen 9.x is higher than normal memory utilization on servers that for the most part have been running without issues for years. This issue did not occur overnight but this is a gradualen-USCommunityServer 2.1 SP1 (Build: 61025.2)