add v6.1.4 release notes

releases/release-6.1.4.md

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+---
+title: TiDB 6.1.4 Release Notes
+summary: 了解 TiDB 6.1.4 版本的新功能、兼容性变更、改进提升，以及错误修复。
+---
+
+# TiDB 6.1.4 Release Notes
+
+发版日期：2023 年 2 月 8 日
+
+TiDB 版本：6.1.4
+
+试用链接：[快速体验](https://docs.pingcap.com/zh/tidb/v6.1/quick-start-with-tidb) | [生产部署](https://docs.pingcap.com/zh/tidb/v6.1/production-deployment-using-tiup) | [下载离线包](https://cn.pingcap.com/product-community/?version=v6.1.4#version-list)
+
+## 提升改进
+
+- TiFlash
+
+    - 降低了在高强度的更新负载下的 IOPS 和写放大 [#6460](https://github.com/pingcap/tiflash/issues/6460) @[flowbehappy](https://github.com/flowbehappy)
+
+- Tools
+
+    - TiCDC
+
+        - 增加了dml batch 操作功能，提升了跑批场景下的吞吐 [#7653](https://github.com/pingcap/tiflow/issues/7653) @[asddongmen](https://github.com/asddongmen)
+
+    - Lightning
+
+        - 将前置检查项 `clusterResourceCheckItem` 和 `emptyRegionCheckItem` 的严重等级（severity）从 Critical 改为 Warning [#37654](https://github.com/pingcap/tidb/issues/37654) @[lance6716](https://github.com/lance6716)
+
+## Bug 修复
+
++ TiDB
+
+    - 修复了创建表时列的默认值和列类型不一致没有自动修正的问题 [#34881](https://github.com/pingcap/tidb/issues/34881) @[Lloyd-Pottiger](https://github.com/Lloyd-Pottiger) @[mjonss](https://github.com/mjonss)
+    - Fix data race in the LazyTxn.LockKeys [#40355](https://github.com/pingcap/tidb/issues/40355) @[HuSharp](https://github.com/HuSharp)
+    - Fix the case that INSERT/REPLACE might panic in a long session connection [#40351](https://github.com/pingcap/tidb/issues/40351) @[fanrenhoo](https://github.com/fanrenhoo)
+    - Fix the issue that hcursor read being canceled by GC [#39447](https://github.com/pingcap/tidb/issues/39447)@[zyguan](https://github.com/zyguan)
+    - Fix the issue that the pessimistic autocommit configuration does not work for point get plans [#39928](https://github.com/pingcap/tidb/issues/39928)@[zyguan](https://github.com/zyguan)
+    - Block modify column of partitioned table, even if it was not changing data when put into the DDL queue. [#40620](https://github.com/pingcap/tidb/issues/40620) @[mjonss](https://github.com/mjonss)
+    - 修复查询 INFORMATION_SCHEMA.TIKV_REGION_STATUS 返回不正确结果的问题 @[zimulala](https://github.com/zimulala)
+    - Fix the issue that the `IN` and `NOT IN` subqueries in some patterns report the `Can't find column` error [#37032](https://github.com/pingcap/tidb/issues/37032) @[AilinKid](https://github.com/AilinKid) @[lance6716](https://github.com/lance6716)
+
+- PD
+
+    - 修复 PD 在特殊情况下非预期添加多个 Learner 的问题 [#5786](https://github.com/tikv/pd/issues/5786) @[HunDunDM](https://github.com/HunDunDM)
+
++ TiKV
+
+    - 修复 Gitpod 环境中存在多个 `cgroup` 和 `mountinfo` 时 TiDB 启动异常的问题 [#13660](https://github.com/tikv/tikv/issues/13660) @[tabokie](https://github.com/tabokie)
+    - 修复 tikv-ctl 执行 `reset-to-version` 命令时异常终止的问题 [#13829](https://github.com/tikv/tikv/issues/13829) @[tabokie](https://github.com/tabokie)
+    - 修复误报 `PessimisticLockNotFound` 的问题 [#13425](https://github.com/tikv/tikv/issues/13425) @[sticnarf](https://github.com/sticnarf)
+    - 修复单次写入超过 2GiB 时会发生 panic 的问题。[#13848](https://github.com/tikv/tikv/issues/13848) @[YuJuncen](https://github.com/YuJuncen)
+    - 修复了悲观事务内，当 TiDB 和 TiKV 间存在网络问题时，执行语句出错后可能出现的数据一致性问题。 [#14038](https://github.com/tikv/tikv/issues/14038) @[MyonKeminta](https://github.com/MyonKeminta)
+    - 修复当未启用 new collation 时 `LIKE` 操作符中的 `_` 无法匹配非 ASCII 字符的问题 [#13769](https://github.com/tikv/tikv/issues/13769) @[YangKeao](https://github.com/YangKeao)
+
++ TiFlash
+
+    - 修复小概率情况下出现的 tiflash 全局锁长时间阻塞的问题 [#6418](https://github.com/pingcap/tiflash/issues/6418) @[SeaRise](https://github.com/SeaRise)
+    - 修复一个在高更新负载下会可能导致 OOM 的问题 [#6407](https://github.com/pingcap/tiflash/issues/6407) @[JaySon-Huang](https://github.com/JaySon-Huang)
+
++ Tools
+
+    + Backup & Restore (BR)
+
+        - 修复在某些情况下因无法获取 region size 导致恢复失败的问题. [#36053](https://github.com/pingcap/tidb/issues/36053) @[YuJuncen](https://github.com/YuJuncen)
+        - 修复使用 br debug 命令解析 backupmeta 文件 panic 的问题.[#40878](https://github.com/pingcap/tidb/issues/40878) @[MoCuishle28](https://github.com/MoCuishle28)
+
+    + TiCDC
+
+        - Fix an issue that checkpoint can not advance when replicating many tables. [#8004](https://github.com/pingcap/tiflow/issues/8004) @[asddongmen](https://github.com/asddongmen)
+        - Fix the issue of transaction-atomicity and protocol can't be updated via config file. [#7935](https://github.com/pingcap/tiflow/issues/7935) @[CharlesCheung96](https://github.com/CharlesCheung96)
+        - 修复存在高版本 TiFlash 时，TiCDC 会误报错的问题 [#7744](https://github.com/pingcap/tiflow/issues/7744) @[overvenus](https://github.com/overvenus)
+        - Fix an OOM issue when TiCDC replicates big transactions [#7913](https://github.com/pingcap/tiflow/issues/7913)
+        - Fix the bug that context deadline was exceeded when replicating data without split big txn [#7982](https://github.com/pingcap/tiflow/issues/7982) @[asddongmen](https://github.com/asddongmen)
+        - 修复 `changefeed query` 的输出中 `sasl-password` 显示为明文的问题 [#7182](https://github.com/pingcap/tiflow/issues/7182) @[dveeden](https://github.com/dveeden)
+        - 修复用户快速删除、创建同名同步任务可能导致的数据丢失问题 [#7657](https://github.com/pingcap/tiflow/issues/7657) @[overvenus](https://github.com/overvenus)
+
+    + TiDB Data Migration (DM)
+
+        - 修复当 `SHOW GRANTS` 结果的数据库名包含 "*" 时导致 precheck 报错的问题 [#7645](https://github.com/pingcap/tiflow/issues/7645) @[lance6716]
+        - 修复 DM 因 binlog 中 query event 为 COMMIT 时打印过多日志的问题 [#7525](https://github.com/pingcap/tiflow/issues/7525) @[liumengya94]
+        - 修复当 SSL 参数仅指定 `ssl-ca` 时 DM 任务无法启动的问题 [#7941](https://github.com/pingcap/tiflow/issues/7941) @[liumengya94]
+        - 修复当在某个表上同时指定 `update` 和 `non-update` 类型的 expression filters 时, 导致所有 UPDATE 被跳过的问题 [#7831](https://github.com/pingcap/tiflow/issues/7831) @[lance6716]
+        - 修复当某个表上仅指定 `update-old-value-expr` 或 `update-new-value-expr` 时不生效或导致 panic 的问题 [#7774](https://github.com/pingcap/tiflow/issues/7774) @[lance6716]