what are the Tables to fetch data from St04 and St03 tcodes

Hi,

I want to check my database growth on routine basis along with the average response time. I use tcodes St04 for db growth and St03 for av. resp time.Now, i am planning to develop a report on routine db growth and av resp time. For this, i need to know about the tables working behind St03 and St04. Can anybody help me in getting this.?

Regards,

Aditya