m¶
Description¶
Select a metric for the align verb.
It works with metrics whose values are reported as float64, including all metrics of type cumulativeCounter, gauge or delta.
For tdigest metrics, please use m_tdigest(), instead. For OpenTelemetry histograms and exponential histograms, please use m_object(), instead.
Return type¶
float64
Domain¶
This is a scalar function (calculates a single output value for a single input row.)
Categories¶
Usage¶
m(metricName, [ filter ])
Argument |
Type |
Optional |
Repeatable |
Restrictions |
|---|---|---|---|---|
metricName |
string |
no |
no |
constant |
filter |
bool |
yes |
no |
none |
Examples¶
align 5m, request_rate: rate(m("requests_total"))
Calculate the per-second rate for the selected metric “requests_total”. The dataset must already implement the “metric” interface.
align 5m, request_rate: rate(m("requests_total", return_code >= 400 and return_code <= 599))
Calculate the per-second rate for the selected metric “requests_total” whose return_code is between 400 and 599. The dataset must already implement the “metric” interface.