[9.0] [DOCS] Disk space aware threadpool merge scheduler (#130465)#130468
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elasticsearchmachine merged 1 commit intoelastic:9.0from Jul 2, 2025
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This documents the new threadpool-based merge scheduler, which is disk space aware, and blocks merges when disk space is low. The code changes were mostly introduced in elastic#120869 and elastic#127613 .
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Backports the following commits to 9.0: