wyxxxcat opened a new pull request, #66969:
URL: https://github.com/apache/doris/pull/66969
### What problem does this PR solve?
Issue Number: close #xxx
Related PR: #xxx
Problem Summary:
MetaService rate limiting lacks sufficient observability before enforcement
is enabled, making it difficult to evaluate trigger frequency and validate
stress thresholds safely.
Introduce `enable_ms_rate_limit_dry_run` to evaluate rate-limit conditions
without rejecting requests. Record trigger metrics by pressure reason and
export the sampled MetaService CPU and memory usage through bvars.
Rate-limit enforcement remains controlled independently by
`enable_ms_rate_limit` and `enable_ms_rate_limit_injection`.
### Release note
None
### Check List (For Author)
- Test <!-- At least one of them must be included. -->
- [ ] Regression test
- [ ] Unit Test
- [ ] Manual test (add detailed scripts or steps below)
- [ ] No need to test or manual test. Explain why:
- [ ] This is a refactor/code format and no logic has been changed.
- [ ] Previous test can cover this change.
- [ ] No code files have been changed.
- [ ] Other reason <!-- Add your reason? -->
- Behavior changed:
- [ ] No.
- [ ] Yes. <!-- Explain the behavior change -->
- Does this need documentation?
- [ ] No.
- [ ] Yes. <!-- Add document PR link here. eg:
https://github.com/apache/doris-website/pull/1214 -->
### Check List (For Reviewer who merge this PR)
- [ ] Confirm the release note
- [ ] Confirm test cases
- [ ] Confirm document
- [ ] Add branch pick label <!-- Add branch pick label that this PR should
merge into -->
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