Java process dies

Hi,

We have installed tools release 8.96H1 on our test server. After I bring the services up for WAS, system works fine for sometime (about 3-4 hrs). After that java.exe related to the application server dies and we have no session to service users. I talked to Oracle and they gave me configurations for JAS, WAS and JDBJ. I set WAS min/max memory for JVM to be 64mb/1024mb. I set the Xk option to be 9000 assuming this is happening due to Java heap fragmentation. Has anybody experienced this before? If yes, what should be the settings for WAS and JAS?

Thanks,
--Sam

Apps Release: 8.9, Tools Release: 8.96H1
Database: Oracle 10G on HP Unix, JAS Server: Intel/Windows 2003, WebSphere 6.0.13, IBM HTTP Server 6.0.13

We also had a similar problem and it got resolved by increasing the initial heap size to 512M and maximum to 1024M. (by the way our JAS Server was Websphere 6 on Windows 2003)