How to raise the detailed statistics maintained more than 15 days?
In Admin->Database Maintenance->Performance Database, the value of "Detailed statistics will be maintained for the last" is accepted less than 15 days.
How can I raise this value more than 15 days, such as 30 days or 60 days?
Is there any xml or conf files to config that value? Or in whitch table this value is stored, that can be changed?