We are looking at NPM/APM and I understand the pollers, but one of our concerns seems that 20000 monitors and we are bumping into SQL performance concerns and with over 4000 nodes we are wondering how folks are dealing with change management and the tools to manage this size of environment. If you factor a scale of about 40,000 total monitors with between 1 and 10 minutes ( I know the devil is in the details here), but would anyone be willing to have a discussion with me if your size is similar?