I contacted IBm regarding This issue. They suggested some DB2 optmizations. We are in process of implementing these changes. We see little performance improvment.
We are having similar problem which is explained by ucbus. we used to have around 30 instances and 60 work items. We increased our application load to around 150 instances and 300 work item ...
If Admin transfer the application to any authorized user ,sometimes it gives error stating that 'Item not found'.It doesn't happene for all the Work items.It happens with some of the Work items ...