Yukang-Lian opened a new pull request, #67603:
URL: https://github.com/apache/doris/pull/67603
### What problem does this PR solve?
Issue Number: None
Related PR: #64954
Problem Summary: Backport #64954 to `branch-4.0` so an oversized leading
cumulative rowset can be excluded by level-size trimming instead of being
selected repeatedly.
The change removes the promotion-size early return, keeps the singleton
guard intact, and applies the behavior to both cloud and local size-based
cumulative-compaction policies. The test conflict was resolved against this
branch's `olap` layout while preserving the source regression scenarios.
Source commit: `a1e076e8d6969feafd8411f7b19e22664f43c543`. The branch is
based on the latest `branch-4.0` at publication time.
### Release note
Avoid repeatedly compacting an oversized cumulative rowset on branch-4.0.
### Check List (For Author)
- Test: Source cloud and local regression coverage backported
- Clang Format 16 changed-line check: passed
- `git diff --check`: passed
- Full branch-specific BE unit tests were not run locally; hosted CI is
requested below
- Behavior changed: Yes
- Allows level-size trimming to exclude an oversized leading rowset
- Does this need documentation: No
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