Fix TTL expired data ratio in settle compaction - #18777
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jt2594838
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Sep 30, 2026
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Description
Restore the TTL cleanup threshold
Fix the forced cleanup threshold from
TTLto3 × TTLso thatexpired_data_ratiocontrols selection before forced cleanup is due. Handle multiplication overflow and zero TTL correctly.Avoid rewriting clean files
Require a positive dirty-device ratio for ratio-based selection, preventing repeated compaction of clean files when
expired_data_ratio=0.