How to read ST03N datasets from DB

Hi Experts,

We want to read data from ST03N transaction to create a performance report for the system.

Basically we are looking for the values of following fields for a day:-

Average response time , DB response time , DB size used and

TOP 10 transactions (taking max runtime)

I have tried using FM : sapwl_workload_get_statistic and sapwl_workload_get_summary

But it always raise an exception NO DATA FOUND

Any pointers on how to use these Fmu2019s or any other alternative method to read data sets of ST03N

Will be highly appreciated .

Thanks,

Prashanti