[WIP]: add v8.5.4 release notes #21913
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| title: TiDB 8.5.4 Release Notes | ||
| summary: Learn about the compatibility changes, improvements, and bug fixes in TiDB 8.5.4. | ||
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| # TiDB 8.5.4 Release Notes | ||
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| Release date: xx xx, 2025 | ||
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| TiDB version: 8.5.4 | ||
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| Quick access: [Quick start](https://docs.pingcap.com/tidb/v8.5/quick-start-with-tidb) | [Production deployment](https://docs.pingcap.com/tidb/v8.5/production-deployment-using-tiup) | ||
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| ## Compatibility changes | ||
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| - note [#issue](https://github.com/pingcap/${repo-name}/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
| - (dup): release-7.5.7.md > Compatibility changes - TiKV deprecates the following configuration items and replaces them with the new [`gc.auto-compaction`](https://docs.pingcap.com/tidb/v8.5/tikv-configuration-file/#gcauto-compaction) configuration group, which controls automatic compaction behavior [#18727](https://github.com/tikv/tikv/issues/18727) @[v01dstar](https://github.com/v01dstar) | ||
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| - Deprecated configuration items: [`region-compact-check-interval`](https://docs.pingcap.com/tidb/v8.5/tikv-configuration-file#region-compact-check-interval), [`region-compact-check-step`](https://docs.pingcap.com/tidb/v8.5/tikv-configuration-file#region-compact-check-step), [`region-compact-min-tombstones`](https://docs.pingcap.com/tidb/v8.5/tikv-configuration-file#region-compact-min-tombstones), [`region-compact-tombstones-percent`](https://docs.pingcap.com/tidb/v8.5/tikv-configuration-file#region-compact-tombstones-percent), [`region-compact-min-redundant-rows`](https://docs.pingcap.com/tidb/v8.5/tikv-configuration-file#region-compact-min-redundant-rows-new-in-v710), and [`region-compact-redundant-rows-percent`](https://docs.pingcap.com/tidb/v8.5/tikv-configuration-file#region-compact-redundant-rows-percent-new-in-v710). | ||
| - New configuration items: [`gc.auto-compaction.check-interval`](https://docs.pingcap.com/tidb/v8.5/tikv-configuration-file#check-interval-new-in-v757), [`gc.auto-compaction.tombstone-num-threshold`](https://docs.pingcap.com/tidb/v8.5/tikv-configuration-file#tombstone-num-threshold-new-in-v757), [`gc.auto-compaction.tombstone-percent-threshold`](https://docs.pingcap.com/tidb/v8.5/tikv-configuration-file#tombstone-percent-threshold-new-in-v757), [`gc.auto-compaction.redundant-rows-threshold`](https://docs.pingcap.com/tidb/v8.5/tikv-configuration-file#redundant-rows-threshold-new-in-v757), [`gc.auto-compaction.redundant-rows-percent-threshold`](https://docs.pingcap.com/tidb/v8.5/tikv-configuration-file#redundant-rows-percent-threshold-new-in-v757), and [`gc.auto-compaction.bottommost-level-force`](https://docs.pingcap.com/tidb/v8.5/tikv-configuration-file#bottommost-level-force-new-in-v757). | ||
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| ## Improvements | ||
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| + TiDB | ||
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Collaborator
Author
There was a problem hiding this comment. v8.5.3 already includes the following issue for pingcap/tidb#62232. Now in v8.5.4, there is another PR pingcap/tidb#63485 for the same issue. Should we use the same release note in v8.5.4? |
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| - note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
| - note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
| - (dup): release-9.0.0.md(beta.1) > # SQL * Support creating global indexes on non-unique columns of partitioned tables [#58650](https://github.com/pingcap/tidb/issues/58650) @[Defined2014](https://github.com/Defined2014) @[mjonss](https://github.com/mjonss) | ||
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| - (dup): release-9.0.0.md(beta.1) > Improvements> TiDB - Support applying the `semi_join_rewrite` hint to Semi Joins in `IN` subqueries [#58829](https://github.com/pingcap/tidb/issues/58829) @[qw4990](https://github.com/qw4990) | ||
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| + TiKV | ||
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| - note [#issue](https://github.com/tikv/tikv/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
| - note [#issue](https://github.com/tikv/tikv/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
| - (dup): release-7.5.7.md > Improvements> TiKV - Optimize the tail latency of async snapshot and write operations in environments with a large number of SST files [#18743](https://github.com/tikv/tikv/issues/18743) @[Connor1996](https://github.com/Connor1996) | ||
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| + PD | ||
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| - note [#issue](https://github.com/tikv/pd/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
| - note [#issue](https://github.com/tikv/pd/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
| - (dup): release-7.5.7.md > Improvements> PD - Reduce unnecessary error logs [#9370](https://github.com/tikv/pd/issues/9370) @[bufferflies](https://github.com/bufferflies) | ||
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| + TiFlash | ||
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| - note [#issue](https://github.com/pingcap/tiflash/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
| - note [#issue](https://github.com/pingcap/tiflash/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
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| + Tools | ||
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| + Backup & Restore (BR) | ||
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| - note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
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| - note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
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| + TiCDC | ||
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| - note [#issue](https://github.com/pingcap/tiflow/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
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| - note [#issue](https://github.com/pingcap/tiflow/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
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| + TiDB Data Migration (DM) | ||
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| - note [#issue](https://github.com/pingcap/tiflow/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
| - note [#issue](https://github.com/pingcap/tiflow/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
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| + TiDB Lightning | ||
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| - note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
| - note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
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| + Dumpling | ||
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| - note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
| - note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
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| + TiUP | ||
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| - note [#issue](https://github.com/pingcap/tiup/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
| - note [#issue](https://github.com/pingcap/tiup/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
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| ## Bug fixes | ||
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| + TiDB | ||
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| - note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
| - note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
| - (dup): release-7.5.7.md > Bug fixes> TiDB - Fix the issue that row count estimates across months or years can be significantly overestimated [#50080](https://github.com/pingcap/tidb/issues/50080) @[terry1purcell](https://github.com/terry1purcell) | ||
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| + TiKV | ||
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| - note [#issue](https://github.com/tikv/tikv/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
| - note [#issue](https://github.com/tikv/tikv/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
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| + PD | ||
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| - note [#issue](https://github.com/tikv/pd/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
| - note [#issue](https://github.com/tikv/pd/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
| - (dup): release-9.0.0.md(beta.1) > Bug fixes> PD - Fix the issue that the PD client retry policy is not properly initialized [#9013](https://github.com/tikv/pd/issues/9013) @[rleungx](https://github.com/rleungx) | ||
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| + TiFlash | ||
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| - note [#issue](https://github.com/pingcap/tiflash/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
| - note [#issue](https://github.com/pingcap/tiflash/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
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| + Tools | ||
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| + Backup & Restore (BR) | ||
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| - note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
qiancai marked this conversation as resolved.
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| - note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
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| + TiCDC | ||
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| - note [#issue](https://github.com/pingcap/tiflow/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
| - note [#issue](https://github.com/pingcap/tiflow/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
qiancai marked this conversation as resolved.
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| + TiDB Data Migration (DM) | ||
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| - note [#issue](https://github.com/pingcap/tiflow/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
| - note [#issue](https://github.com/pingcap/tiflow/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
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| + TiDB Lightning | ||
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| - note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
| - note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
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| + Dumpling | ||
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| - note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
| - note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
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| + TiUP | ||
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| - note [#issue](https://github.com/pingcap/tiup/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
| - note [#issue](https://github.com/pingcap/tiup/issues/${issue-id}) @[Contributor GitHub ID](https://github.com/${github-id}) | ||
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