We are experiencing problems with Sun HotSpot JVM 1.4.2_05/1.4.2_08 along with BEA WebLogic 8.1.4/8.1.5. The signature of the problem is that we observe excessive GC, increasing System Memory usage, increasing Processor usage and increasing System Handle count. For our confirmation for the problem with HotSpot JVM, we tried running our application using JRockit 1.4.2_05/1.4.2_08 with BEA WebLogic 8.1.4/8.1.5, and there the application does not show the signature explained above. Also on WebSphere with IBM's JVM we don see this problem.
In result of the above said behavior of HotSpot JVM, our application response times have crossed undesirable limits (because of GC hogging the system).
we used following JVM options in WL: -Xms512m -Xmx1464m -XX:MaxPermSize=96m-Xloggc:c:/gc.log -XX:+PrintGCDetails.
The application is web based, which is trying to fetch some data from the repositories/ database and renders it on IE. I am not very sure exactly what kind of details can help you more to relate to the problem.