Thanks for your information, these information really help us to know more about sql guard. My boss ask me to survey database security product for our databases protecting. I found that guardium seems which we want, but we don't know about what it really be, and cannot found any benchmark or experience report on internet. I believe that they will not impact database performance, since that guardium is an appliance, but how about it's throughput, will it impact network access? And do you use their application monitoring product? Is it really can find out the use who access the database since we have application server to handle each connection between web application and database?