Rename two JVM runtime metrics

[trask]

Changes

Renames 2 JVM runtime metrics:

• process.runtime.jvm.cpu.utilization --> process.runtime.jvm.cpu.recent_utilization
• process.runtime.jvm.system.cpu.utilization --> process.runtime.jvm.system.cpu.recent_utilization

This is to make clear that these are gauges (utilization for "some" recent period of time) as opposed to measures of utilization since the last metric export/scrape.

EDIT: maybe process.runtime.jvm.cpu.load and process.runtime.jvm.system.cpu.load would also be good? (and matches the MBean attribute names that these are sourced from)

[carlosalberto]

I'm guessing this is done to simply be more descriptive - is that it, or is there another reason?

[trask]

I'm guessing this is done to simply be more descriptive - is that it, or is there another reason?

sorry, I added reason into description above now.

also, as I was doing that, I revisited and now wondering if these might be better:

• process.runtime.jvm.cpu.load
• process.runtime.jvm.system.cpu.load

I think this similarly avoids the issue about "utilization since last export", and they also match the MBean attribute names that they're sourced from.

[reyang]

@trask heads up - most likely this PR will be closed, and we'll ask you to resubmit the PR in a new repo, please refer to #3474 (comment).

[jsuereth]

Please move this PR to https://github.com/open-telemetry/semantic-conventions

[github-actions]

This PR was marked stale due to lack of activity. It will be closed in 7 days.

[trask]

Closing in favor of issues: open-telemetry/semantic-conventions#42 and open-telemetry/semantic-conventions#41