v8.5.5 tikv-configuration-file: update flow-control override behavior for v8.5.5 (#21244)#21270
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ti-chi-bot[bot] merged 5 commits intopingcap:release-8.5from Jan 19, 2026
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….5.5 Update documentation for storage.flow-control.l0-files-threshold and storage.flow-control.soft-pending-compaction-bytes-limit to reflect the behavior change introduced in TiKV PR pingcap#18994. - v8.5.4 and earlier: flow-control config unconditionally overrides the corresponding RocksDB config. - From v8.5.5: flow-control config only overrides when it is smaller than the RocksDB config, to avoid weakening RocksDB's compaction acceleration mechanism when increasing flow-control thresholds. Also update the corresponding RocksDB config items (level0-slowdown-writes-trigger, soft-pending-compaction-bytes-limit) with the same version-specific behavior notes.
Use reference-based approach to avoid duplication: - In flow-control config items, use brief note block to reference RocksDB config items - In RocksDB config items, keep detailed version-specific behavior with links This makes future version logic changes easier to maintain (only 2 places instead of 4). Signed-off-by: hhwyt <hhwyt1@gmail.com>
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This is an automated cherry-pick of #21244
What is changed, added or deleted? (Required)
ref tikv/tikv#18994
Update documentation for
storage.flow-control.l0-files-thresholdandstorage.flow-control.soft-pending-compaction-bytes-limitto reflect the behavior change introduced in TiKV PR #18994.Also update the corresponding RocksDB config items (
level0-slowdown-writes-trigger,soft-pending-compaction-bytes-limit) with the same version-specific behavior notes.Which TiDB version(s) do your changes apply to? (Required)
What is the related PR or file link(s)?
Do your changes match any of the following descriptions?