freemandealer opened a new pull request, #61834:
URL: https://github.com/apache/doris/pull/61834
TabletHotspot memory kept growing by about 1.8-2.7 GB per day because
counters for cold tablets remained resident even after they no longer
contributed to the hour/day/week hotspot windows. Their history deques kept
consuming memory, and the sharded unordered_maps continued to hold expanded
bucket arrays without a reclamation path.
Fix this by running a maintenance pass after each hourly rollup to evict
counters whose last access is older than the one-week window and whose
current/day/week contributions are all zero. When a shard becomes sparse after
eviction, rebuild the map to release bucket memory. Also add GC-focused
diagnostics and unit tests to verify eviction, recreation, and shard compaction
behavior.
### What problem does this PR solve?
Issue Number: close #xxx
Related PR: #xxx
Problem Summary:
### 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
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