liaoxin01 opened a new pull request, #66136:
URL: https://github.com/apache/doris/pull/66136
Backport apache/doris#64734 to branch-4.1.
### What problem does this PR solve?
Issue Number: None
Related PR: apache/doris#64734
Problem Summary: Add the per-BE `file_cache_warm_up_job_num` bvar so
operators can see how many warm-up jobs are currently held in BE memory. The
count changes only on real job state transitions, so retry/replay and duplicate
clear requests do not skew it. The lazy cancellation cleanup path also
decrements the metric and removes the matching event filter.
### Release note
Add the `file_cache_warm_up_job_num` BE metric.
### Check List (For Author)
- Test: Manual test
- clang-format 16 dry-run check passed for
`be/src/cloud/cloud_warm_up_manager.cpp`
- `git diff --check` passed
- Local build was not run because this target-branch worktree does not
provide `hooks/setup_worktree.sh` or `thirdparty/installed`; CI is pending
- Behavior changed: Yes. A new per-BE warm-up job count metric is exposed.
- Does this need documentation: No
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