add release note for v6.5.8 (#16367)

TOC.md

@@ -1039,6 +1039,7 @@
   - v6.6
     - [6.6.0-DMR](/releases/release-6.6.0.md)
   - v6.5
+    - [6.5.8](/releases/release-6.5.8.md)
     - [6.5.7](/releases/release-6.5.7.md)
     - [6.5.6](/releases/release-6.5.6.md)
     - [6.5.5](/releases/release-6.5.5.md)

releases/release-6.5.8.md

@@ -0,0 +1,91 @@
+---
+title: TiDB 6.5.8 Release Notes
+summary: Learn about the compatibility changes, improvements, and bug fixes in TiDB 6.5.8.
+---
+
+# TiDB 6.5.8 Release Notes
+
+Release date: February 2, 2024
+
+TiDB version: 6.5.8
+
+Quick access: [Quick start](https://docs.pingcap.com/tidb/v6.5/quick-start-with-tidb) | [Production deployment](https://docs.pingcap.com/tidb/v6.5/production-deployment-using-tiup) | [Installation packages](https://www.pingcap.com/download/?version=v6.5.8#version-list)
+
+## Compatibility changes
+
+- Introduce the TiKV configuration item [`gc.num-threads`](https://docs.pingcap.com/tidb/v6.5/tikv-configuration-file#num-threads-new-in-v658) to set the number of GC threads when `enable-compaction-filter` is `false`  [#16101](https://github.com/tikv/tikv/issues/16101) @[tonyxuqqi](https://github.com/tonyxuqqi)
+
+## Improvements
+
++ TiFlash
+
+    - Reduce the impact of background GC tasks on read and write task latency [#8650](https://github.com/pingcap/tiflash/issues/8650) @[JaySon-Huang](https://github.com/JaySon-Huang)
+
++ Tools
+
+    + TiCDC
+
+        - Support [querying the downstream synchronization status of a changefeed](https://docs.pingcap.com/tidb/v6.5/ticdc-open-api-v2#query-whether-a-specific-replication-task-is-completed), which helps you determine whether the upstream data changes received by TiCDC have been synchronized to the downstream system completely [#10289](https://github.com/pingcap/tiflow/issues/10289) @[hongyunyan](https://github.com/hongyunyan)
+
+    + TiDB Lightning
+
+        - Improve the performance of `ALTER TABLE` when importing a large number of small tables [#50105](https://github.com/pingcap/tidb/issues/50105) @[D3Hunter](https://github.com/D3Hunter)
+
+## Bug fixes
+
++ TiDB
+
+    - Fix the issue that enforced sorting might become ineffective when a query uses optimizer hints (such as `STREAM_AGG()`) that enforce sorting and its execution plan contains `IndexMerge` [#49605](https://github.com/pingcap/tidb/issues/49605) @[AilinKid](https://github.com/AilinKid)
+    - Fix the issue that histogram statistics might not be parsed into readable strings when the histogram boundary contains `NULL` [#49823](https://github.com/pingcap/tidb/issues/49823) @[AilinKid](https://github.com/AilinKid)
+    - Fix the issue that hints cannot be used in `REPLACE INTO` statements [#34325](https://github.com/pingcap/tidb/issues/34325) @[YangKeao](https://github.com/YangKeao)
+    - Fix the issue that query results are incorrect due to `STREAM_AGG()` incorrectly handling CI [#49902](https://github.com/pingcap/tidb/issues/49902) @[wshwsh12](https://github.com/wshwsh12)
+    - Fix the issue that the query result of a range partitioned table is incorrect in some cases due to wrong partition pruning [#50082](https://github.com/pingcap/tidb/issues/49823) @[Defined2014](https://github.com/Defined2014)
+    - Fix the issue that the auto-increment ID allocation reports an error due to concurrent conflicts when using an auto-increment column with `AUTO_ID_CACHE=1` [#50519](https://github.com/pingcap/tidb/issues/50519) @[tiancaiamao](https://github.com/tiancaiamao)
+    - Mitigate the issue that TiDB nodes might encounter OOM errors when dealing with a large number of tables or partitions [#50077](https://github.com/pingcap/tidb/issues/50077) @[zimulala](https://github.com/zimulala)
+    - Fix the issue that data is inconsistent under the TiDB Distributed eXecution Framework (DXF) when executing `ADD INDEX` after the DDL Owner is network isolated [#49773](https://github.com/pingcap/tidb/issues/49773) @[tangenta](https://github.com/tangenta)
+    - Fix the issue that TiDB might panic when a query contains the Apply operator and the `fatal error: concurrent map writes` error occurs [#50347](https://github.com/pingcap/tidb/issues/50347) @[SeaRise](https://github.com/SeaRise)
+    - Fix the issue that the `COMMIT` or `ROLLBACK` operation executed through `COM_STMT_EXECUTE` fails to terminate transactions that have timed out [#49151](https://github.com/pingcap/tidb/issues/49151) @[zyguan](https://github.com/zyguan)
+    - Fix the issue that executing `SELECT INTO OUTFILE` using the `PREPARE` method incorrectly returns a success message instead of an error [#49166](https://github.com/pingcap/tidb/issues/49166) @[qw4990](https://github.com/qw4990)
+    - Fix the issue that executing `UNIQUE` index lookup with an `ORDER BY` clause might cause an error [#49920](https://github.com/pingcap/tidb/issues/49920) @[jackysp](https://github.com/jackysp)
+    - Fix the issue that the `DELETE` and `UPDATE` statements using index lookup might report an error when `tidb_multi_statement_mode` mode is enabled [#50012](https://github.com/pingcap/tidb/issues/50012) @[tangenta](https://github.com/tangenta)
+    - Fix the issue that TiDB might not simultaneously establish the new statistics metadata when executing a large number of `CREATE TABLE` statements in a short period of time [#36004](https://github.com/pingcap/tidb/issues/36004) @[xuyifangreeneyes](https://github.com/xuyifangreeneyes)
+    - Fix the issue that the `LEADING` hint does not take effect in `UNION ALL` statements [#50067](https://github.com/pingcap/tidb/issues/50067) @[hawkingrei](https://github.com/hawkingrei)
+    - Fix the issue that using old interfaces might cause inconsistent metadata for tables [#49751](https://github.com/pingcap/tidb/issues/49751) @[hawkingrei](https://github.com/hawkingrei)
+    - Fix the issue that common hints do not take effect in `UNION ALL` statements [#50068](https://github.com/pingcap/tidb/issues/50068) @[hawkingrei](https://github.com/hawkingrei)
+    - Fix the issue that TiDB returns wrong query results when processing `ENUM` or `SET` types by constant propagation [#49440](https://github.com/pingcap/tidb/issues/49440) @[winoros](https://github.com/winoros)
+
++ TiKV
+
+    - Fix the issue that TiKV might panic when gRPC threads are checking `is_shutdown` [#16236](https://github.com/tikv/tikv/issues/16236) @[pingyu](https://github.com/pingyu)
+    - Fix the issue that TiKV converts the time zone incorrectly for Brazil and Egypt [#16220](https://github.com/tikv/tikv/issues/16220) @[overvenus](https://github.com/overvenus)
+    - Fix the issue that TiDB and TiKV might produce inconsistent results when processing `DECIMAL` arithmetic multiplication truncation [#16268](https://github.com/tikv/tikv/issues/16268) @[solotzg](https://github.com/solotzg)
+
++ PD
+
+    - Fix the issue that querying a Region without a leader using `pd-ctl` might cause PD to panic [#7630](https://github.com/tikv/pd/issues/7630) @[rleungx](https://github.com/rleungx)
+
++ TiFlash
+
+    - Fix the issue that the `lowerUTF8` and `upperUTF8` functions do not allow characters in different cases to occupy different bytes [#8484](https://github.com/pingcap/tiflash/issues/8484) @[gengliqi](https://github.com/gengliqi)
+    - Fix the issue that TiFlash panics after executing `ALTER TABLE ... MODIFY COLUMN ... NOT NULL`, which changes nullable columns to non-nullable [#8419](https://github.com/pingcap/tiflash/issues/8419) @[JaySon-Huang](https://github.com/JaySon-Huang)
+    - Fix the issue that after terminating a query, TiFlash crashes due to concurrent data conflicts when a large number of tasks on TiFlash are canceled at the same time [#7432](https://github.com/pingcap/tiflash/issues/7432) @[SeaRise](https://github.com/SeaRise)
+
++ Tools
+
+    + Backup & Restore (BR)
+
+        - Fix the issue that the `Unsupported collation` error is reported when you restore data from backups of an old version [#49466](https://github.com/pingcap/tidb/issues/49466) @[3pointer](https://github.com/3pointer)
+        - Fix the issue that BR cannot retry when encountering an error while reading file content from S3 [#49942](https://github.com/pingcap/tidb/issues/49942) @[Leavrth](https://github.com/Leavrth)
+        - Fix the issue that log backup gets stuck after changing the TiKV IP address on the same node [#50445](https://github.com/pingcap/tidb/issues/50445) @[3pointer](https://github.com/3pointer)
+
+    + TiCDC
+
+        - Fix the issue that after filtering out `add table partition` events is configured in `ignore-event`, TiCDC does not replicate other types of DML changes for related partitions to the downstream [#10524](https://github.com/pingcap/tiflow/issues/10524) @[CharlesCheung96](https://github.com/CharlesCheung96)
+        - Fix the issue that the changefeed reports an error after `TRUNCATE PARTITION` is executed on the upstream table [#10522](https://github.com/pingcap/tiflow/issues/10522) @[sdojjy](https://github.com/sdojjy)
+        - Fix the issue that the changefeed `resolved ts` does not advance in extreme cases [#10157](https://github.com/pingcap/tiflow/issues/10157) @[sdojjy](https://github.com/sdojjy)
+        - Fix the issue that TiCDC returns the `ErrChangeFeedAlreadyExists` error when concurrently creating multiple changefeeds [#10430](https://github.com/pingcap/tiflow/issues/10430) @[CharlesCheung96](https://github.com/CharlesCheung96)
+
+    + TiDB Lightning
+
+        - Fix the issue that TiDB Lightning might fail to import data when EBS BR is running [#49517](https://github.com/pingcap/tidb/issues/49517) @[mittalrishabh](https://github.com/mittalrishabh)
+        - Fix the issue that data might be lost when TiDB Lightning ingests files in batches [#50198](https://github.com/pingcap/tidb/issues/50198) @[D3Hunter](https://github.com/D3Hunter)

releases/release-notes.md

@@ -37,6 +37,7 @@ title: Release Notes
 
 ## 6.5
 
+- [6.5.8](/releases/release-6.5.8.md): 2024-02-02
 - [6.5.7](/releases/release-6.5.7.md): 2024-01-08
 - [6.5.6](/releases/release-6.5.6.md): 2023-12-07
 - [6.5.5](/releases/release-6.5.5.md): 2023-09-21

releases/release-timeline.md

@@ -9,6 +9,11 @@ This document shows all the released TiDB versions in reverse chronological orde
 
 | Version | Release Date |
 | :--- | :--- |
+<<<<<<< HEAD
+=======
+| [6.5.8](/releases/release-6.5.8.md) | 2024-02-02 |
+| [7.6.0-DMR](/releases/release-7.6.0.md) | 2024-01-25 |
+>>>>>>> a542615873 (add release note for v6.5.8 (#16367))
 | [6.5.7](/releases/release-6.5.7.md) | 2024-01-08 |
 | [7.1.3](/releases/release-7.1.3.md) | 2023-12-21 |
 | [6.5.6](/releases/release-6.5.6.md) | 2023-12-07 |