Increase retention period ST03

Hi,

I want to increase the retention period data in the ST03 for a Netweaver 7.00. I know that is in Collector and Performance DB --> Performance Database --> Workload Collector Database --> Reorganization --> Control. Here I can see three first columns: Daily, Week and Month Aggrs Ret.Per. and another three: TOTAL Daily, TOTAL Wkly and TOTAL Mnth AggrRet. If, for example, I want to change the month period, do I have to change the retention period in both columns Month Aggrs Ret.Per and TOTAL Mnth AggrRet?

Another question I have is about the space: the only way where the the space is going to increase is in the file stats or also in database?

Regards.