Hi, I just started to learn Grafana/PromQL last week. I’m not sure why this isn’t working, so if anyone could help I’d appreciate it!
Grafana version: 9.2
Prometheus version: 2.39.1
- What: Trying to create a time series chart to show usage percentage (threads used vs threads max) over time. Both metrics are of type Gauge.
How: Using PromQL to divide threads used metric / threads max metric:
javamelody_threads_count / javamelody_tomcat_threads_max. This doesn’t work, I get no data. If I use
avg(javamelody_threads_count) / avg(javamelody_tomcat_threads_max)it works but I want to divide raw values (non calculated).
- What happened: No data
- Expected: percentage values calculated for time range show up in a time series graph
- Any errors: None, just no data
Here is a screenshot showing both values. My goal is to divide the two to calculate the percentage and show that in the graph instead.