STAD related parameters:
1. stat/file -- define the file name of the actual STAD content – default value: /usr/sap/RPP/D00/data/stat
2. stat/max_files -- define the max number of STAD files in the system. – default value: 48 (but system takes at least 12. meaning at least half day records; default is 48 which is 2 days)
3. stat/rfcrec – the number of RFC calls statistics to record per STAD record
