jayakasadev opened a new pull request, #67502:
URL: https://github.com/apache/doris/pull/67502
### What problem does this PR solve?
Issue Number: close #67458
Related PR: N/A
Problem Summary:
* writes are rejected with `TOO_MANY_VERSION` errors when a tablet has too
many versions. The code checks `_approximate_num_rowsets`, but its not emitted
as a metric.
* `tablet_version_num_distribution` is similar, but it updates less
frequently and skips tablets that are currently being written to
* added `tablet_approximate_num_rowsets_distribution` which uses
`_approximate_num_rowsets` and includes active tablets
* allows users to create alerts before getting `TOO_MANY_VERSION` errors
### Release note
Add `tablet_approximate_num_rowsets_distribution` for cloud-mode tablet
version-limit monitoring
### Check List (For Author)
- Test
- [x] Unit Test
- Added
`CloudTabletMgrTest.TestApproximateRowsetsMetricIncludesActiveTablets`.
- [x] Manual test
- `build-support/clang-format.sh`
- `build-support/check-format.sh`
- `build-support/check-build-hygiene.sh`
- `git diff --check`
- Behavior changed:
- [x] Yes.
- Cloud BEs expose the new
`tablet_approximate_num_rowsets_distribution` Prometheus histogram.
- Does this need documentation?
- [x] No.
### Check List (For Reviewer who merge this PR)
- [ ] Confirm the release note
- [ ] Confirm test cases
- [ ] Confirm document
- [ ] Add branch pick label
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