I need to ask couple of additional questions to understand the problem completely:
What do you exactly mean by "lost the monitoring"? Could you please describe issue with more details?
Do you have one or more probes attache dto your NAM server. Or any other data sources (ESM, AppMon...?) If answer is more than one, my next question is if you changed monitoring interval for all data sources or for one probe only ?
Thank you in advance for all the information, I believe it would allow us to reproduce probalem and go back to you with a solution
I just wanted to let you know, that we managed to reproduce the issue in the lab. It looks like root cause of the problem is fact, that there are devices with different monitoring interval attached to the same NAM Server
As a workaround I would recommend to detach all devices producing 5 minutes intervals samples (not only probes, it includes also APPMon if you have it in your environment) from the NAM server and attach them again after short moment