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v8.5.3: add release notes #20662
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v8.5.3: add release notes
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add TiFlash
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--- | ||
title: TiDB 8.5.3 Release Notes | ||
summary: 了解 TiDB 8.5.3 版本的兼容性变更、改进提升,以及错误修复。 | ||
--- | ||
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# TiDB 8.5.3 Release Notes | ||
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发版日期:2025 年 x 月 x 日 | ||
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TiDB 版本:8.5.3 | ||
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试用链接:[快速体验](https://docs.pingcap.com/zh/tidb/v8.5/quick-start-with-tidb) | [生产部署](https://docs.pingcap.com/zh/tidb/v8.5/production-deployment-using-tiup) | [下载离线包](https://cn.pingcap.com/product-community/?version=v8.5.3#version-list) | ||
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## 兼容性变更 | ||
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- note [#issue](https://github.com/pingcap/${repo-name}/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
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- 重新引入了 telemetry 功能支持,但对其实现方式进行了优化:将原有的网络上报机制调整为本地日志输出方式 [#61766](https://github.com/pingcap/tidb/issues/61766) @[Defined2014](https://github.com/Defined2014) | ||
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## 改进提升 | ||
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+ TiDB | ||
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- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
- (dup): release-7.5.5.md > 改进提升> TiDB - 当某个统计信息完全由 TopN 构成,且对应表的统计信息中修改行数不为 0 时,对于未命中 TopN 的等值条件,估算结果从 0 调整为 1 [#47400](https://github.com/pingcap/tidb/issues/47400) @[terry1purcell](https://github.com/terry1purcell) | ||
- 提升使用全局排序添加唯一索引的性能,并优化添加重复唯一索引的报错信息 [#61689](https://github.com/pingcap/tidb/issues/61689) @[CbcWestwolf](https://github.com/CbcWestwolf) | ||
- import into 使用全局排序时,禁用 TiKV 切换到导入模式 [#60361](https://github.com/pingcap/tidb/issues/60361) @[D3Hunter](https://github.com/D3Hunter) | ||
- 新增加索引的导入速度监控 [#60925](https://github.com/pingcap/tidb/issues/60925) @[CbcWestwolf](https://github.com/CbcWestwolf) | ||
- 优化预读缓冲区的使用,提升读取效率 [#59754](https://github.com/pingcap/tidb/issues/59754) @[lance6716](https://github.com/lance6716) | ||
- 优化 merge sort 子任务的分发逻辑,提升速度 [#60375](https://github.com/pingcap/tidb/issues/60375) @[tangenta](https://github.com/tangenta) | ||
- 提升创建大量外建表的建表速度并优化内存使用 [#61126](https://github.com/pingcap/tidb/issues/61126) @[GMHDBJD](https://github.com/GMHDBJD) | ||
- 优化读取 tables 系统表的速度 [#62020](https://github.com/pingcap/tidb/issues/62020) @[tangenta](https://github.com/tangenta) | ||
- 新增导入期间分裂 region 和 ingest 数据的流控接口 [#61553](https://github.com/pingcap/tidb/issues/61553) @[tangenta](https://github.com/tangenta) | ||
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+ TiKV | ||
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- note [#issue](https://github.com/tikv/tikv/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
- note [#issue](https://github.com/tikv/tikv/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
- (dup): release-9.0.0.md > 改进提升> TiKV - 优化残留数据清理机制,减少对请求延迟的影响 [#18107](https://github.com/tikv/tikv/issues/18107) @[LykxSassinator](https://github.com/LykxSassinator) | ||
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+ PD | ||
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- 增加了 GO Runtime 相关监控 [#8931](https://github.com/tikv/pd/issues/8931) @[bufferflies](https://github.com/bufferflies) | ||
- 延长了触发慢节点驱逐 leader 后的恢复时间 [#9329](https://github.com/tikv/pd/issues/9329) @[rleungx](https://github.com/rleungx) | ||
- 优化了 balance region 调度器的算分公式 [#9145](https://github.com/tikv/pd/issues/9145) @[bufferflies](https://github.com/bufferflies) | ||
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+ TiFlash | ||
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- note [#issue](https://github.com/pingcap/tiflash/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
- note [#issue](https://github.com/pingcap/tiflash/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
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- 增加 TiFlash 获取存储层快照重试次数来增强大表上查询的稳定性 [#10300](https://github.com/pingcap/tiflash/issues/10300) @[JaySon-Huang](https://github.com/JaySon-Huang) | ||
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- 增强 TiFlash 在宽表场景下 OOM 风险相关的监测指标 [#10272](https://github.com/pingcap/tiflash/issues/10272) @[JaySon-Huang](https://github.com/JaySon-Huang) | ||
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+ Tools | ||
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+ Backup & Restore (BR) | ||
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- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
- (dup): release-9.0.0.md > 改进提升> Tools> Backup & Restore (BR) - 采用并行方式,提升 PITR 恢复过程中的索引修复速度 [#59158](https://github.com/pingcap/tidb/issues/59158) @[Leavrth](https://github.com/Leavrth) | ||
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- 如今,TiKV 的 Download API 支持裁切掉 SST 中某段时间的数据 [#18399](https://github.com/tikv/tikv/issues/18399) @[3pointer](https://github.com/3pointer) | ||
- 通过过滤元数据文件,优化了 PiTR 恢复读取元数据的耗时 [#61318](https://github.com/pingcap/tidb/issues/61318) @[3pointer](https://github.com/3pointer) | ||
- 如今即便指定了 `-f` 来过滤表,BR 也会对集群内是否存在表进行检查 [#61592](https://github.com/pingcap/tidb/issues/61592) @[RidRisR](https://github.com/RidRisR) | ||
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+ TiCDC | ||
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- note [#issue](https://github.com/pingcap/tiflow/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
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- note [#issue](https://github.com/pingcap/tiflow/issues/${issue-id}) @[贡献者 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}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
- note [#issue](https://github.com/pingcap/tiflow/issues/${issue-id}) @[贡献者 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}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 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}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 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}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
- note [#issue](https://github.com/pingcap/tiup/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
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## 错误修复 | ||
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+ TiDB | ||
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- 修复了 `ALTER RANGE meta SET PLACEMENT POLICY` key 范围错误的问题 [#60888](https://github.com/pingcap/tidb/issues/60888) @[nolouch](https://github.com/nolouch) | ||
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- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
- (dup): release-9.0.0.md > 错误修复> TiDB - 修复在添加索引过程中减少 Worker 数量可能导致任务卡住的问题 [#59267](https://github.com/pingcap/tidb/issues/59267) @[D3Hunter](https://github.com/D3Hunter) | ||
- (dup): release-9.0.0.md > 错误修复> TiDB - 修复 `ADMIN SHOW DDL JOBS` 语句无法正确显示行数的问题 [#59897](https://github.com/pingcap/tidb/issues/59897) @[tangenta](https://github.com/tangenta) | ||
- (dup): release-9.0.0.md > 错误修复> TiDB - 修复在添加索引过程中动态调整 Worker 数量可能导致的数据竞争问题 [#59016](https://github.com/pingcap/tidb/issues/59016) @[D3Hunter](https://github.com/D3Hunter) | ||
- (dup): release-7.5.5.md > 错误修复> TiDB - 修复 Grafana 中 **Stats Healthy Distribution** 面板的数据可能错误的问题 [#57176](https://github.com/pingcap/tidb/issues/57176) @[hawkingrei](https://github.com/hawkingrei) | ||
- (dup): release-9.0.0.md > 错误修复> TiDB - 修复使用 `IMPORT INTO ... FROM SELECT` 导入 TiFlash 时发生错误的问题 [#58443](https://github.com/pingcap/tidb/issues/58443) @[D3Hunter](https://github.com/D3Hunter) | ||
- (dup): release-9.0.0.md > 错误修复> TiDB - 修复启用 `tidb_enable_dist_task` 导致 TiDB 升级失败的问题 [#54061](https://github.com/pingcap/tidb/issues/54061) @[tangenta](https://github.com/tangenta) | ||
- (dup): release-7.5.6.md > 错误修复> TiDB - 修复对统计信息的异常处理不当导致后台任务超时的时候,内存内的统计信息被误删除的问题 [#57901](https://github.com/pingcap/tidb/issues/57901) @[hawkingrei](https://github.com/hawkingrei) | ||
- (dup): release-9.0.0.md > 错误修复> TiDB - 修复在分布式执行框架下执行添加索引操作没有正确更新行数的问题 [#58573](https://github.com/pingcap/tidb/issues/58573) @[D3Hunter](https://github.com/D3Hunter) | ||
- 修复执行有损 DDL 后,查询 TiFlash 数据不一致的问题 [#61455](https://github.com/pingcap/tidb/issues/61455) @[Lloyd-Pottiger](https://github.com/Lloyd-Pottiger) | ||
- 修复使用全局排序加索引时,merge sort 阶段监控缺失的问题 [#61025](https://github.com/pingcap/tidb/issues/61025) @[fzzf678](https://github.com/fzzf678) | ||
- 修复使用 GCS 遇到 EOF 错误没有重试的问题 [#59754](https://github.com/pingcap/tidb/issues/59754) @[D3Hunter](https://github.com/D3Hunter) | ||
- 修复使用全局排序时遇到不合法的 KV 范围问题 [#59841](https://github.com/pingcap/tidb/issues/59841) @[GMHDBJD](https://github.com/GMHDBJD) | ||
- 修复`CREATE INDEX IF NOT EXISTS`语句生成空索引名的问题 [#61265](https://github.com/pingcap/tidb/issues/61265) @[CbcWestwolf](https://github.com/CbcWestwolf) | ||
- 修复禁用 MDL 后,DDL 更新 schema 版本失败后卡住的问题 [#61210](https://github.com/pingcap/tidb/issues/61210) @[wjhuang2016](https://github.com/wjhuang2016) | ||
- 修复统计信息系统表展示非 public 索引的问题 [#60430](https://github.com/pingcap/tidb/issues/60430) @[tangenta](https://github.com/tangenta) | ||
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+ TiKV | ||
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- note [#issue](https://github.com/tikv/tikv/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
- note [#issue](https://github.com/tikv/tikv/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
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+ PD | ||
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- 修复了慢节点检测机制中 `recovery-duration` 没有生效的问题 [#9384](https://github.com/tikv/pd/issues/9384) @[rleungx](https://github.com/rleungx) | ||
- 修复了 evict leader 调度器可能在集群升级后被错误暂停的问题 [#9416](https://github.com/tikv/pd/issues/9416) @[rleungx](https://github.com/rleungx) | ||
- 修复了 TiDB Dashboard 导致的 goroutine 泄露问题 [#9402](https://github.com/tikv/pd/issues/9402) @[baurine](https://github.com/baurine) | ||
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+ TiFlash | ||
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- note [#issue](https://github.com/pingcap/tiflash/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
- note [#issue](https://github.com/pingcap/tiflash/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
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- 修复创建 `((NULL))` 形式的表达式索引会导致 TiFlash panic 的问题 [#9891](https://github.com/pingcap/tiflash/issues/9891) @[JaySon-Huang](https://github.com/JaySon-Huang) | ||
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+ Tools | ||
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+ Backup & Restore (BR) | ||
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- (dup): release-9.0.0.md > 错误修复> Tools> Backup & Restore (BR) - 修复在断点恢复时额外检查存储节点可用空间的问题 [#54316](https://github.com/pingcap/tidb/issues/54316) @[Leavrth](https://github.com/Leavrth) | ||
- 修复 PITR 无法恢复大于 3072 字节的索引的问题 [#58430](https://github.com/pingcap/tidb/issues/58430) @[YuJuncen](https://github.com/YuJuncen) | ||
- 修复在全量备份过程中 RangeTree 结构内存使用效率低下的问题 [#58587](https://github.com/pingcap/tidb/issues/58587) @[3pointer](https://github.com/3pointer) | ||
- 增加了和 External Storage 交互时对 HTTP/2 GOAWAY 错误的容忍度 [#60143](https://github.com/pingcap/tidb/issues/60143) @[joechenrh](https://github.com/joechenrh) | ||
- 修复了恢复过程中因为 swtich mode 导致的 “keepalive watchdog timedout” 的问题 [#18541](https://github.com/tikv/tikv/issues/18541) @[Leavrth](https://github.com/Leavrth) | ||
- 修复了日志备份上传较大数据到 Azure Blob Storage 时会非常缓慢的问题。 [#18410](https://github.com/tikv/tikv/issues/18410) @[YuJuncen](https://github.com/YuJuncen) | ||
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- (dup): release-9.0.0.md > 错误修复> Tools> Backup & Restore (BR) - 修复 PITR 无法恢复大于 3072 字节的索引的问题 [#58430](https://github.com/pingcap/tidb/issues/58430) @[YuJuncen](https://github.com/YuJuncen) | ||
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- (dup): release-9.0.0.md > 错误修复> Tools> Backup & Restore (BR) - 修复在全量备份过程中 RangeTree 结果内存使用效率低下的问题 [#58587](https://github.com/pingcap/tidb/issues/58587) @[3pointer](https://github.com/3pointer) | ||
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+ TiCDC | ||
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- note [#issue](https://github.com/pingcap/tiflow/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
- note [#issue](https://github.com/pingcap/tiflow/issues/${issue-id}) @[贡献者 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}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
- note [#issue](https://github.com/pingcap/tiflow/issues/${issue-id}) @[贡献者 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}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
- 修复 lightning 向 TiKV 发起的 RPC 请求超时后返回 context deadline 的问题 [#61326](https://github.com/pingcap/tidb/issues/61326) @[OliverS929](https://github.com/OliverS929) | ||
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+ Dumpling | ||
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- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
- note [#issue](https://github.com/pingcap/tidb/issues/${issue-id}) @[贡献者 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}) @[贡献者 GitHub ID](https://github.com/${github-id}) | ||
- note [#issue](https://github.com/pingcap/tiup/issues/${issue-id}) @[贡献者 GitHub ID](https://github.com/${github-id}) |
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Preview: https://pingcap-docsite-preview-git-release-no-a159c9-oreoxmts-projects.vercel.app/zh/tidb/stable/release-8.5.3/