Hi Team,

We use a discrete plugin(panel) in Grafana to display the data from 
blackbox_exporter to track the end-point(URL) availability and Prometheus 
data retention period is 50 days. This panel shows URL available and  
unavailable time in percentage.

Issue is smaller down time (E.g: 502 return code for 1hr )  is getting  
ignored when we select a larger time range in Grafana (above 1 month) and 
the panel is showing 100% URL available.  But if we select a smaller time 
frame in Grafana, the URL unavailable time is displayed.

Suspecting issue with  below query mentioned in panel. Can somebody please 
provide a solution for this issue ?


*Prom query Used in Grafana discrete plugin *
probe_httpd_status_code{instance="https://xxxxxxx",job=blackbox-generic-
endpoints"}


Prometheus Version - 2.31.0
Blackbox exporter - 0.13.0
Grafana Version - 6.7.4
Scrape_interval: 30s

Thanks and regards
SreeHari 

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