> Why each sub-graph (color) doesn't start from the buttom? for example, the red line is a stright line that starts in (14:21:50,4) and ends in (6:40:45,4). How can it be that the red line doesn't start from (some-date,0)?
The reason the line doesn't start from zero is because you didn't scrape a zero value for that timeseries. The first point shown is the first value scraped. In prometheus, every unique combination of metric_name + labels defines a new timeseries. It starts when the first data point is scraped. If you stop providing data then it goes "stale" - either when the scrape job which had previously scraped that timeseries does another scrape and that timeseries is not present, or after 5 minutes (although it can come back to life again if the exact same metric_name+labels combination appears in a subsequent scrape) -- You received this message because you are subscribed to the Google Groups "Prometheus Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/3a1bc57d-06f6-4154-9afa-b817d40d6d31o%40googlegroups.com.
