We are in the process of changing our network structure, and some of the router addresses changed. What I didn't know is that performance stats appear to disappear when this change happens. Are they held in the database? If so, how would I access them? Example...router DET-2611 changed name to DET-RTR and changed address from 10.4.1.1 to 10.243.4.1. Can we still access the performance data for 10.4.1.1 prior to this change?
I believe you can open the Network Performance Monitor in Microsoft Access (the file is named SWNetPerfMon.cfg). This will give you DB-level access to all of the captured data. You will need to shut the performance monitor down to open the file cleanly, or make a copy and work with the copy in Access.
I have not done this personally, but SolarWinds support indicates this file is an Access DB and even suggests using Access to run maintenance on it.