Timers: publishPercentileHistogram vs serviceLevelObjectives

[cchafer]

Hi,
Not really an issue, more a proposal.

Micrometer akka export timers buckets based on the class io.micrometer.core.instrument.distribution.PercentileHistogramBuckets, that generates a ton of "le" entries.

I'm confident it works great for a lot of people, but I would like to be able to choose custom bucket values, through serviceLevelObjectives.

My idea is to add an entry in the config to specify the objectives. It could be global , or maybe, if needed, by filter.

Before digging into the code, I'd like to know your thoughts about it : useless, risky ,useless but why not, great, ...

Thanks for reading me !