upgrade/migration from 8.3 to 10.2.1 issues

[dbahiker]

single server with single store in sql. We are getting a problem where reports just dont display when called for viewing. They will work for 10-20 min then they just stop. The only way we can get it working again for all users is to stop and restart the dispatcher. We first thought it was because we didn't have isapi. We now have that configured. But we are still getting the issue. We opened a support case with IBM support but they want us to move the cm to a different directory. They think it is going to break up the memory in java. Help or any input suggestions are welcome.

**Update**
We have been doing some more troubleshooting with IBM and BlueNet Tech today and we found out if we increase the "Maximum memory for Tomcat in MB" in "IBM Cognos Configuration" we are able to work with more users. We currently have it set to 4096; server is a VM with 12GB available to it. We have also noticed that the java.exe gets stuck at 2,497,600K when the reports stop displaying for users.

**Update 2**
10.2.1 has huge problem with cleaning the cache in the BIBus when reports are ran with mulpite data connection.
I would not recommend anyone upgrade to 10.2.1 until this issue has a fix.
http://www.cognoise.com/index.php/topic,21917.0.html

PMR 04322,442,000
http://www-01.ibm.com/support/docview.wss?crawler=1&uid=swg1PM91815

[dbahiker]

10.2.1 BIBus freezing up has been logged as a bug.
http://www-01.ibm.com/support/docview.wss?crawler=1&uid=swg1PM93520