releases: add tidb 4.0.10 release notes

TOC.md

@@ -517,6 +517,7 @@
   + v5.0
     + [5.0.0-rc](/releases/release-5.0.0-rc.md)
   + v4.0
+    + [4.0.10](/releases/release-4.0.10.md)
     + [4.0.9](/releases/release-4.0.9.md)
     + [4.0.8](/releases/release-4.0.8.md)
     + [4.0.7](/releases/release-4.0.7.md)

releases/release-4.0.10.md

@@ -0,0 +1,78 @@
+---
+title: TiDB 4.0.10 Release Notes
+---
+
+# TiDB 4.0.10 Release Notes
+
+Release date: January 15, 2021
+
+TiDB version: 4.0.10
+
+## Compatibility Changes
+
+## New Features
+
++ PD
+
+    - Support configuration `enable-redact-log` to enable log desensitization or not [#3266](https://github.com/pingcap/pd/pull/3266)
+
++ TiFlash
+
+    - Add `security.redact_info_log` config, which can redact user data from logs
+    - Support lossless schema change for enum type
+
+## Improvements
+
++ TiDB
+
+    - Make txn entry size limit configurable [#21843](https://github.com/pingcap/tidb/pull/21843)
+
++ PD
+
+    - Optimize the store state filter metrics [#3100](https://github.com/tikv/pd/pull/3100)
+    - Upgrade go.etcd.io/bbolt to v1.3.5 [#3331](https://github.com/tikv/pd/pull/3331)
+
+## Bug Fixes
+
++ TiDB
+
+    - Fix a concurrency bug that may cause the batch client timeout [#22336](https://github.com/pingcap/tidb/pull/22336)
+    - Avoid duplicate bindings caused by concurrent baseline capture [#22295](https://github.com/pingcap/tidb/pull/22295)
+    - Make baseline capture work when log level is 'debug' [#22293](https://github.com/pingcap/tidb/pull/22293)
+    - Correctly GC locks when region merge happens during scanning & resolving locks [#22267](https://github.com/pingcap/tidb/pull/22267)
+    - Return correct results for user variables of datetime type [#22143](https://github.com/pingcap/tidb/pull/22143)
+    - Avoid using index merge when there are multiple table filters. [#22124](https://github.com/pingcap/tidb/pull/22124)
+    - Fix the `wrong precision` problem in TiFlash caused by prepare plan cache. [#21960](https://github.com/pingcap/tidb/pull/21960)
+    - Fix the bug that schema change will lead to incorrect results. [#21596](https://github.com/pingcap/tidb/pull/21596)
+    - Avoid unnecessary column flag changes incurred by `ALTER TABLE`. [#21474](https://github.com/pingcap/tidb/pull/21474)
+    - Set database name for table aliases of query blocks used in optimizer hint. [#21380](https://github.com/pingcap/tidb/pull/21380)
+    - Generate proper hint for IndexHashJoin / IndexMergeJoin [#21020](https://github.com/pingcap/tidb/pull/21020)
+
++ TiKV
+
+    - Fix wrong mapping between ready and peer [#9409](https://github.com/tikv/tikv/pull/9409)
+    - Fix some logs are not redacted when `security.redact-info-log` is on [#9314](https://github.com/tikv/tikv/pull/9314)
+
++ PD
+
+    - Fix the id allocation is not monotonic [#3308](https://github.com/tikv/pd/pull/3308) [#3323](https://github.com/tikv/pd/pull/3323)
+    - Fix the pd client could be blocked in some cases [#3285](https://github.com/pingcap/pd/pull/3285)
+
++ TiFlash
+
+    - Fixed an issue that TiFlash can't start because TiFlash failed to process the schema of TiDB with an old version
+    - Fixed an issue where TiFlash can't start due to incorrect handling of cpu_time on the RedHat system
+    - Fixed the issue that TiFlash fails to start when path_realtime_mode is true
+    - Fixed the issue of incorrect results when calling the `substr` function with three parameters
+
+## 未分类 notes。请对以下 Note 进行分类，挪动到上面 Compatibility changes、New features、Improvement 分类下
+
++ Tools
+
+    - TiCDC
+
+        * Fix a bug that MySQL connection is not recycled when some transactions executed with failure [#1285](https://github.com/pingcap/ticdc/pull/1285)
+        * Fixed bug in passing `max-batch-size` to codec [#1253](https://github.com/pingcap/ticdc/pull/1253)
+        * Enable Unified Sorter by default [#1230](https://github.com/pingcap/ticdc/pull/1230)
+        * Fix a bug that the cdc owner might consume too much memory in the etcd watch client [#1227](https://github.com/pingcap/ticdc/pull/1227)
+        * Fix a bug that outdated metadata could cause the newly created changefeed abnormal. [#1184](https://github.com/pingcap/ticdc/pull/1184)

releases/release-notes.md

@@ -11,6 +11,7 @@ aliases: ['/docs/dev/releases/release-notes/','/docs/dev/releases/rn/']
 
 ## 4.0
 
+- [4.0.10](/releases/release-4.0.10.md)
 - [4.0.9](/releases/release-4.0.9.md)
 - [4.0.8](/releases/release-4.0.8.md)
 - [4.0.7](/releases/release-4.0.7.md)