Provide percentile histogram metrics with Observability Api

[kyle-a-wong]

With the new implementation of metrics using micrometer's observability api, there are no long percentile histogram metrics published. It would be nice for them to be included to preserve similar metrics that were provided in spring boot 2.7

[bclozel]

I don't think percentile histograms were contributed by default previously. Did you configure something specific in the past to enable them?

I think you can still enable those on a per-metric basis (or for all at once) with "management.metrics.distribution.percentiles-histogram.your.metric=true" (or use the "all" metric name to match all).

See the Spring Boot reference docs and the configuration properties reference.

[kyle-a-wong]

Hi @bclozel , i responded to your comment on my SO post as well, but you can find the property and the enabling of histograms in AutoTimeProperties.java. The configuration to set would be management.graphql.autotime.percentiles-histogram=true. This is available for any metric provided by spring-boot-actuator

[bclozel]

Answered in the original StackOverflow question.