In Basis release 7.00 SAP developed a completely new workload statistics collector to meet the requirements of large systems. After you upgrade to Basis 7.00, you can no longer display workload statistics data in ST03N that has been entered before the upgrade.
To keep the ST03N history data you need to export it before the upgrade and import it afterwards. See Note 1005238 and 1006116.
After importing the old data (for instance you old 46C system) the ST03N data will look like this :
I took about 45 minutes to export the data before the upgrade and about the same to import it again after the upgrade.
