Hi Liz,
Thanks for your response.
I am aware of the large gap between used memory and resident memory but the difference cannot be ten folds.
When the used memory is 200 GB and resident memory is around 1900GB. I am not saying its a problem but i am saying is that from operating system wise its still very high usage.
SAP might have given the flexibility to lower the resident memory usage especially when the difference is very high.