Nagios Support Forum

i have gone through the kbs/links i can find about rrd/npcd but I cant seem to resolve my issue, currently my nagios server has stopped displaying any performance data for any host/service check for the past week. Can i get pointers on what to do to resolve this?

This KB article resolves most performance graph problems:

https://support.nagios.com/kb/article.php?id=9

If it doesn't you'll need to enable debugging as outlined in the article and post the output of the logs.