I am referring to https://support.nagios.com/kb/article/nagios-core-performance-graphs-using-influxdb-nagflux-grafana-histou-802.html. I am running influxdb 1.7.9 on CentOS Linux release 7.7.1908 (Core) . I am seeing the breaks as per the grafana chart.
I have got this response from Nagios Forum.
The breaks in performance data generally mean you are not receiving valid data back from the plugin during these intervals, or perhaps for some reason, the performance data is being deleted before it is being processed. You may want to look at the influxdb logs to see if it is reporting any errors.
Versions :- influxdb-1.7.9-1.x86_64 , grafana-6.5.3-1.x86_64, histou v0.4.3, Nagflux v0.4.1, CentOS Linux release 7.7.1908 (Core), Nagios Core 4.4.5
Please let me know if you need any additional information.