why does not export NumGC metric?

[zhangbo1882]

I note that NumGC is not exported as a metric? Is there any special reason?

[ArthurSens]

Hey @zhangbo1882 , could you elaborate on what is this NumGC metric? Is it related to go standard metrics? Where could I read more about it? :)

[zhangbo1882]

Currently, prometheus client_golang has added some metrics based on the golang runtime.MemStats.

func NewGoCollector() Collector {
metrics: memStatsMetrics{
}
}

So we have metrics such as go_memstats_next_gc_bytes. NumGC is a field of runtime.MemStats. We can also add a counter metric for NumGC. But now it seems that there is no.

[kakkoyun]

Currently, prometheus client_golang has added some metrics based on the golang runtime.MemStats.

func NewGoCollector() Collector {
metrics: memStatsMetrics{
}
}

So we have metrics such as go_memstats_next_gc_bytes. NumGC is a field of runtime.MemStats. We can also add a counter metric for NumGC. But now it seems that there is no.

We already have those metrics.

https://github.com/prometheus/client_golang/blob/80d3f0b5b36c891016370423516e353b1a5f0a55/prometheus/collectors/go_collector_go121_test.go#L33-L35C40

Maybe you're misconfiguring your collector?