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1 change: 1 addition & 0 deletions TOC.md
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Expand Up @@ -516,6 +516,7 @@
- [版本发布历史](/dm/dm-release-notes.md)
- TiDB Lightning
- [概述](/tidb-lightning/tidb-lightning-overview.md)
- [`IMPORT INTO` 和 TiDB Lightning 对比](/tidb-lightning/import-into-vs-tidb-lightning.md)
- [快速上手](/get-started-with-tidb-lightning.md)
- [部署 TiDB Lightning](/tidb-lightning/deploy-tidb-lightning.md)
- [目标数据库要求](/tidb-lightning/tidb-lightning-requirements.md)
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9 changes: 7 additions & 2 deletions command-line-flags-for-tidb-configuration.md
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Expand Up @@ -10,7 +10,7 @@ summary: TiDB 配置参数包括启动参数和环境变量。启动参数包括

要快速了解 TiDB 的参数体系与参数作用域,建议先观看下面的培训视频(时长 17 分钟)。

<video src="https://download.pingcap.com/docs-cn%2FLesson10_config.mp4" width="600px" height="450px" controls="controls" poster="https://download.pingcap.com/docs-cn/poster_lesson10.png"></video>
<video src="https://download.pingcap.com/docs-cn%2FLesson10_config.mp4" width="600px" height="450px" controls="controls" poster="https://download.pingcap.com/docs-cn/poster_lesson10.png"></video>

本文将详细介绍 TiDB 的命令行启动参数。TiDB 的默认端口为 4000(客户端请求)与 10080(状态报告)。

Expand Down Expand Up @@ -198,6 +198,11 @@ summary: TiDB 配置参数包括启动参数和环境变量。启动参数包括
- TiDB 用于存放临时文件的目录
- 默认:"/tmp/tidb"

## `--tidb-service-scope`

+ 用于设置当前 TiDB 实例 [`tidb_service_scope`](/system-variables.md#tidb_service_scope-从-v740-版本开始引入) 的初始值。
+ 默认:`""`

## `--token-limit`

+ TiDB 中同时允许运行的 Session 数量,用于流量控制
Expand Down Expand Up @@ -238,4 +243,4 @@ summary: TiDB 配置参数包括启动参数和环境变量。启动参数包括
## `--repair-list`

+ 修复模式下需要修复的表名
+ 默认:""
+ 默认:""
11 changes: 6 additions & 5 deletions information-schema/information-schema-analyze-status.md
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Expand Up @@ -11,8 +11,6 @@ summary: 了解 information_schema 表 `ANALYZE_STATUS`。

从 TiDB v6.1.0 起,可以通过系统表 `mysql.analyze_jobs` 查看过去 7 天内的历史任务记录。

{{< copyable "sql" >}}

```sql
USE information_schema;
DESC analyze_status;
Expand Down Expand Up @@ -40,8 +38,6 @@ DESC analyze_status;
14 rows in set (0.00 sec)
```

{{< copyable "sql" >}}

```sql
SELECT * FROM information_schema.analyze_status;
```
Expand Down Expand Up @@ -76,4 +72,9 @@ SELECT * FROM information_schema.analyze_status;
* `PROCESS_ID`:执行任务的 process ID。
* `REMAINING_SECONDS`:执行任务预计还需要多少秒才能完成。
* `PROGRESS`:执行任务的进度。
* `ESTIMATED_TOTAL_ROWS`:执行任务需要分析的总行数。
* `ESTIMATED_TOTAL_ROWS`:执行任务需要分析的总行数。

## 另请参阅

- [`ANALYZE TABLE`](/sql-statements/sql-statement-analyze-table.md)
- [`SHOW ANALYZE STATUS`](/sql-statements/sql-statement-show-analyze-status.md)
7 changes: 7 additions & 0 deletions information-schema/information-schema-character-sets.md
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Expand Up @@ -54,3 +54,10 @@ SELECT * FROM `CHARACTER_SETS`;
* `DEFAULT_COLLATE_NAME`:字符集的默认排序规则名称
* `DESCRIPTION`:字符集的描述信息
* `MAXLEN`:该字符集存储一个字符所需要的最大字节数

## 另请参阅

- [`SHOW CHARACTER SET`](/sql-statements/sql-statement-show-character-set.md)
- [`SHOW COLLATION`](/sql-statements/sql-statement-show-collation.md)
- [`INFORMATION_SCHEMA.COLLATIONS`](/information-schema/information-schema-collations.md)
- [`INFORMATION_SCHEMA.COLLATION_CHARACTER_SET_APPLICABILITY`](/information-schema/information-schema-collation-character-set-applicability.md)
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Expand Up @@ -47,3 +47,10 @@ SELECT * FROM COLLATION_CHARACTER_SET_APPLICABILITY WHERE character_set_name='ut

* `COLLATION_NAME`:排序规则名称
* `CHARACTER_SET_NAME`:排序规则所属的字符集名称

## 另请参阅

- [`SHOW CHARACTER SET`](/sql-statements/sql-statement-show-character-set.md)
- [`SHOW COLLATION`](/sql-statements/sql-statement-show-collation.md)
- [`INFORMATION_SCHEMA.CHARACTER_SETS`](/information-schema/information-schema-character-sets.md)
- [`INFORMATION_SCHEMA.COLLATIONS`](/information-schema/information-schema-collations.md)
7 changes: 7 additions & 0 deletions information-schema/information-schema-collations.md
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Expand Up @@ -53,3 +53,10 @@ SELECT * FROM collations WHERE character_set_name='utf8mb4';
* `IS_DEFAULT`:该排序规则是否是所属字符集的默认排序规则
* `IS_COMPILED`:字符集是否编译到服务器中
* `SORTLEN`:排序规则在对字符进行排序时,所分配内存的最小长度

## 另请参阅

- [`SHOW CHARACTER SET`](/sql-statements/sql-statement-show-character-set.md)
- [`SHOW COLLATION`](/sql-statements/sql-statement-show-collation.md)
- [`INFORMATION_SCHEMA.CHARACTER_SETS`](/information-schema/information-schema-character-sets.md)
- [`INFORMATION_SCHEMA.COLLATION_CHARACTER_SET_APPLICABILITY`](/information-schema/information-schema-collation-character-set-applicability.md)
4 changes: 4 additions & 0 deletions information-schema/information-schema-columns.md
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Expand Up @@ -122,3 +122,7 @@ SHOW COLUMNS FROM t1 FROM test;
+-------+---------+------+------+---------+-------+
1 row in set (0.00 sec)
```

## 另请参阅

- [`SHOW COLUMNS FROM`](/sql-statements/sql-statement-show-columns-from.md)
8 changes: 4 additions & 4 deletions information-schema/information-schema-engines.md
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Expand Up @@ -8,8 +8,6 @@ aliases: ['/docs-cn/dev/information-schema/information-schema-engines/']

`ENGINES` 表提供了关于存储引擎的信息。从和 MySQL 兼容性上考虑,TiDB 会一直将 InnoDB 描述为唯一支持的引擎。此外,`ENGINES` 表中其它列值也都是定值。

{{< copyable "sql" >}}

```sql
USE information_schema;
DESC engines;
Expand All @@ -29,8 +27,6 @@ DESC engines;
6 rows in set (0.00 sec)
```

{{< copyable "sql" >}}

```sql
SELECT * FROM engines;
```
Expand All @@ -52,3 +48,7 @@ SELECT * FROM engines;
* `TRANSACTIONS`:存储引擎是否支持事务。
* `XA`:存储引擎是否支持 XA 事务。
* `SAVEPOINTS`:存储引擎是否支持 `savepoints`

## 另请参阅

- [`SHOW ENGINES`](/sql-statements/sql-statement-show-engines.md)
5 changes: 5 additions & 0 deletions information-schema/information-schema-memory-usage.md
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Expand Up @@ -59,3 +59,8 @@ SELECT * FROM information_schema.memory_usage;
* GC_TOTAL:从 TiDB 启动到当前累计由内存使用触发 Golang GC 的次数。
* DISK_USAGE:当前数据落盘的硬盘使用量,单位为 byte。
* QUERY_FORCE_DISK:从 TiDB 启动到当前累计的落盘次数。

## 另请参阅

- [TiDB 内存控制](/configure-memory-usage.md)
- [TiKV 内存参数性能调优](/tune-tikv-memory-performance.md)
6 changes: 5 additions & 1 deletion information-schema/information-schema-partitions.md
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Expand Up @@ -5,7 +5,7 @@ summary: 了解 INFORMATION_SCHEMA 表 `PARTITIONS`。

# PARTITIONS

`PARTITIONS` 表提供有关分区表的信息
`PARTITIONS` 表提供有关[分区表](/partitioned-table.md)的信息

```sql
USE INFORMATION_SCHEMA;
Expand Down Expand Up @@ -115,3 +115,7 @@ SUBPARTITION_ORDINAL_POSITION: NULL
TIDB_PLACEMENT_POLICY_NAME: NULL
2 rows in set (0.00 sec)
```

## 另请参阅

- [用 EXPLAIN 查看分区查询的执行计划](/explain-partitions.md)
8 changes: 2 additions & 6 deletions information-schema/information-schema-processlist.md
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Expand Up @@ -6,7 +6,7 @@ aliases: ['/docs-cn/dev/information-schema/information-schema-processlist/']

# PROCESSLIST

`PROCESSLIST``SHOW PROCESSLIST` 的功能一样,都是查看当前正在处理的请求。
`PROCESSLIST`[`SHOW PROCESSLIST`](/sql-statements/sql-statement-show-processlist.md) 的功能一样,都是查看当前正在处理的请求。

`PROCESSLIST` 表比 `SHOW PROCESSLIST` 的结果多出下面几列:

Expand All @@ -16,8 +16,6 @@ aliases: ['/docs-cn/dev/information-schema/information-schema-processlist/']
* `TxnStart`列:显示事务的开始时间。
* `RESOURCE_GROUP`列:显示对应的资源组名称。

{{< copyable "sql" >}}

```sql
USE information_schema;
DESC processlist;
Expand All @@ -44,8 +42,6 @@ DESC processlist;
13 rows in set (0.00 sec)
```

{{< copyable "sql" >}}

```sql
SELECT * FROM processlist\G
```
Expand Down Expand Up @@ -91,7 +87,7 @@ SELECT * FROM processlist\G
{{< copyable "sql" >}}

```sql
SELECT * FROM cluster_processlist;
SELECT * FROM information_schema.cluster_processlist;
```

```sql
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Expand Up @@ -5,7 +5,7 @@ summary: 了解 INFORMATION_SCHEMA 表 `REFERENTIAL_CONSTRAINTS`。

# REFERENTIAL_CONSTRAINTS

`REFERENTIAL_CONSTRAINTS` 表提供 TiDB 表之间 `FOREIGN KEY` 关系的信息。
`REFERENTIAL_CONSTRAINTS` 表提供 TiDB 表之间 [`FOREIGN KEY`](/foreign-key.md) 关系的信息。

```sql
USE INFORMATION_SCHEMA;
Expand Down
6 changes: 1 addition & 5 deletions information-schema/information-schema-schemata.md
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Expand Up @@ -6,9 +6,7 @@ aliases: ['/docs-cn/dev/information-schema/information-schema-schemata/']

# SCHEMATA

`SCHEMATA` 表提供了关于数据库的信息。表中的数据与 `SHOW DATABASES` 语句的执行结果等价。

{{< copyable "sql" >}}
`SCHEMATA` 表提供了关于数据库的信息。表中的数据与 [`SHOW DATABASES`](/sql-statements/sql-statement-show-databases.md) 语句的执行结果等价。

```sql
USE information_schema;
Expand All @@ -28,8 +26,6 @@ desc SCHEMATA;
5 rows in set (0.00 sec)
```

{{< copyable "sql" >}}

```sql
SELECT * FROM SCHEMATA;
```
Expand Down
8 changes: 8 additions & 0 deletions information-schema/information-schema-sequences.md
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Expand Up @@ -74,3 +74,11 @@ SEQUENCE_SCHEMA: test
COMMENT:
1 row in set (0.00 sec)
```

## 另请参阅

- [`CREATE SEQUENCE`](/sql-statements/sql-statement-create-sequence.md)
- [`SHOW CREATE SEQUENCE`](/sql-statements/sql-statement-show-create-sequence.md)
- [`ALTER SEQUENCE`](/sql-statements/sql-statement-alter-sequence.md)
- [`DROP SEQUENCE`](/sql-statements/sql-statement-drop-sequence.md)
- [序列函数](/functions-and-operators/sequence-functions.md)
2 changes: 1 addition & 1 deletion information-schema/information-schema-session-variables.md
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Expand Up @@ -5,7 +5,7 @@ summary: 了解 INFORMATION_SCHEMA 表 `SESSION_VARIABLES`。

# SESSION_VARIABLES

`SESSION_VARIABLES` 表提供了关于 session 变量的信息。表中的数据跟 `SHOW SESSION VARIABLES` 语句执行结果类似。
`SESSION_VARIABLES` 表提供了关于 session 变量的信息。表中的数据跟 [`SHOW SESSION VARIABLES`](/sql-statements/sql-statement-show-variables.md) 语句执行结果类似。

```sql
USE INFORMATION_SCHEMA;
Expand Down
2 changes: 1 addition & 1 deletion information-schema/information-schema-slow-query.md
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Expand Up @@ -5,7 +5,7 @@ summary: 了解 INFORMATION_SCHEMA 表 `SLOW_QUERY`。

# SLOW_QUERY

`SLOW_QUERY` 表中提供了当前节点的慢查询相关的信息,其内容通过解析当前节点的 TiDB 慢查询日志而来,列名和慢日志中的字段名是一一对应。关于如何使用该表调查和改善慢查询,请参考[慢查询日志文档](/identify-slow-queries.md)
`SLOW_QUERY` 表中提供了当前节点的慢查询相关的信息,其内容通过解析当前节点的 TiDB [慢查询日志](/tidb-configuration-file.md#slow-query-file)而来,列名和慢日志中的字段名是一一对应。关于如何使用该表调查和改善慢查询,请参考[慢查询日志文档](/identify-slow-queries.md)

```sql
USE INFORMATION_SCHEMA;
Expand Down
2 changes: 1 addition & 1 deletion information-schema/information-schema-table-constraints.md
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Expand Up @@ -6,7 +6,7 @@ aliases: ['/docs-cn/dev/information-schema/information-schema-table-constraints/

# TABLE_CONSTRAINTS

`TABLE_CONSTRAINTS` 表记录了表的约束信息
`TABLE_CONSTRAINTS` 表记录了表的[约束](/constraints.md)信息

{{< copyable "sql" >}}

Expand Down
4 changes: 4 additions & 0 deletions information-schema/information-schema-user-privileges.md
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Expand Up @@ -79,3 +79,7 @@ SELECT * FROM USER_PRIVILEGES;
* `TABLE_CATALOG`:表所属的目录的名称。该值始终为 `def`
* `PRIVILEGE_TYPE`:被授权的权限类型,每行只列一个权限。
* `IS_GRANTABLE`:如果用户有 `GRANT OPTION` 的权限,则为 `YES`,否则为 `NO`

## 另请参阅

- [`SHOW GRANTS`](/sql-statements/sql-statement-show-grants.md)
2 changes: 1 addition & 1 deletion information-schema/information-schema-variables-info.md
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Expand Up @@ -5,7 +5,7 @@ summary: 了解 information_schema 表 `VARIABLES_INFO`。

# VARIABLES_INFO

`VARIABLES_INFO` 可用于查看当前 TiDB 集群或实例的系统变量默认值、当前值以及作用域等信息。
`VARIABLES_INFO` 可用于查看当前 TiDB 集群或实例的[系统变量](/system-variables.md)默认值、当前值以及作用域等信息。

```sql
USE information_schema;
Expand Down
7 changes: 6 additions & 1 deletion information-schema/information-schema-views.md
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Expand Up @@ -5,7 +5,7 @@ summary: 了解 INFORMATION_SCHEMA 表 `VIEWS`。

# VIEWS

`VIEWS` 表提供了关于 SQL 视图的信息
`VIEWS` 表提供了关于 [SQL 视图](/views.md)的信息

```sql
USE INFORMATION_SCHEMA;
Expand Down Expand Up @@ -68,3 +68,8 @@ COLLATION_CONNECTION: utf8mb4_0900_ai_ci
* `SECURITY_TYPE``SQL SECURITY` 的值,取值为 `DEFINER``INVOKER`
* `CHARACTER_SET_CLIENT`:在视图创建时 session 变量 `character_set_client` 的值。
* `COLLATION_CONNECTION`:在视图创建时 session 变量 `collation_connection` 的值。

## 另请参阅

- [`CREATE VIEW`](/sql-statements/sql-statement-create-view.md)
- [`DROP VIEW`](/sql-statements/sql-statement-drop-view.md)
2 changes: 1 addition & 1 deletion information-schema/information-schema.md
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Expand Up @@ -8,7 +8,7 @@ summary: Information Schema 是一种查看系统元数据的 ANSI 标准方法

Information Schema 提供了一种查看系统元数据的 ANSI 标准方法。除了包含与 MySQL 兼容的表外,TiDB 还提供了许多自定义的 `INFORMATION_SCHEMA` 表。

许多 `INFORMATION_SCHEMA` 表都有相应的 `SHOW` 命令。查询 `INFORMATION_SCHEMA` 的好处是可以在表之间进行 `join` 操作。
许多 `INFORMATION_SCHEMA` 表都可以通过相应的 `SHOW` 语句查看。查询 `INFORMATION_SCHEMA` 的好处是可以在表之间进行 `join` 操作。

## 与 MySQL 兼容的表

Expand Down
5 changes: 4 additions & 1 deletion mysql-compatibility.md
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Expand Up @@ -32,7 +32,6 @@ TiDB 高度兼容 MySQL 协议,以及 MySQL 5.7 和 MySQL 8.0 常用的功能
* 全文语法与索引 [#1793](https://github.com/pingcap/tidb/issues/1793)
* 空间类型的函数(即 `GIS`/`GEOMETRY`)、数据类型和索引 [#6347](https://github.com/pingcap/tidb/issues/6347)
*`ascii``latin1``binary``utf8``utf8mb4``gbk` 的字符集
* SYS schema
* MySQL 追踪优化器
* XML 函数
* X-Protocol [#1109](https://github.com/pingcap/tidb/issues/1109)
Expand Down Expand Up @@ -224,6 +223,10 @@ TiDB 与 MySQL 在日期时间处理上有如下差异:

MySQL 支持 `SQL_TSI_*`(包括 `SQL_TSI_MONTH``SQL_TSI_WEEK``SQL_TSI_DAY``SQL_TSI_HOUR``SQL_TSI_MINUTE``SQL_TSI_SECOND`,但不包括 `SQL_TSI_YEAR`),但 TiDB 不支持。

### 正则函数

关于 TiDB 中正则函数 `REGEXP_INSTR()``REGEXP_LIKE()``REGEXP_REPLACE()``REGEXP_SUBSTR()` 与 MySQL 的兼容情况,请参考[正则函数与 MySQL 的兼容性](/functions-and-operators/string-functions.md#正则函数与-mysql-的兼容性)

### MySQL 弃用功能导致的不兼容问题

TiDB 不支持 MySQL 中标记为弃用的功能,包括:
Expand Down
2 changes: 1 addition & 1 deletion releases/release-6.5.6.md
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Expand Up @@ -17,7 +17,7 @@ TiDB 版本:6.5.6
- 引入系统变量 [`tidb_opt_enable_hash_join`](https://docs.pingcap.com/zh/tidb/v6.5/system-variables#tidb_opt_enable_hash_join-从-v656-版本开始引入) 控制是否选择表的哈希连接 [#46695](https://github.com/pingcap/tidb/issues/46695) @[coderplay](https://github.com/coderplay)
- 经进一步的测试后,TiCDC Changefeed 配置项 [`case-sensitive`](/ticdc/ticdc-changefeed-config.md) 默认值由 `true` 改为 `false`,即默认情况下 TiCDC 配置文件中涉及的表名、库名大小写不敏感 [#10047](https://github.com/pingcap/tiflow/issues/10047) @[sdojjy](https://github.com/sdojjy)
- TiCDC Changefeed 新增以下配置项:
- [`sql-mode`](/ticdc/ticdc-changefeed-config.md):你可以设置 TiCDC 同步数据时解析 DDL 语句所使用的 [SQL 模式](/ticdc/ticdc-ddl.md#sql-模式) [#9876](https://github.com/pingcap/tiflow/issues/9876) @[asddongmen](https://github.com/asddongmen)
- [`sql-mode`](/ticdc/ticdc-changefeed-config.md):你可以设置 TiCDC 同步数据时解析 DDL 语句所使用的 [SQL 模式](https://docs.pingcap.com/zh/tidb/v6.5/ticdc-ddl#sql-模式) [#9876](https://github.com/pingcap/tiflow/issues/9876) @[asddongmen](https://github.com/asddongmen)
- [`encoding-worker-num`](/ticdc/ticdc-changefeed-config.md)[`flush-worker-num`](/ticdc/ticdc-changefeed-config.md):你可以根据不同的机器规格,设置 redo 模块不同的并发参数 [#10048](https://github.com/pingcap/tiflow/issues/10048) @[CharlesCheung96](https://github.com/CharlesCheung96)
- [`compression`](/ticdc/ticdc-changefeed-config.md):你可以设置 redo log 文件的压缩行为 [#10176](https://github.com/pingcap/tiflow/issues/10176) @[sdojjy](https://github.com/sdojjy)
- [`sink.cloud-storage-config`](/ticdc/ticdc-changefeed-config.md):你可以设置同步数据到对象存储时自动清理历史数据的功能 [#10109](https://github.com/pingcap/tiflow/issues/10109) @[CharlesCheung96](https://github.com/CharlesCheung96)
Expand Down
2 changes: 1 addition & 1 deletion releases/release-7.1.3.md
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Expand Up @@ -15,7 +15,7 @@ TiDB 版本:7.1.3

- 经进一步的测试后,TiCDC Changefeed 配置项 [`case-sensitive`](/ticdc/ticdc-changefeed-config.md) 默认值由 `true` 改为 `false`,即默认情况下 TiCDC 配置文件中涉及的表名、库名大小写不敏感 [#10047](https://github.com/pingcap/tiflow/issues/10047) @[sdojjy](https://github.com/sdojjy)
- TiCDC Changefeed 新增以下配置项:
- [`sql-mode`](/ticdc/ticdc-changefeed-config.md):你可以设置 TiCDC 同步数据时解析 DDL 语句所使用的 [SQL 模式](/ticdc/ticdc-ddl.md#sql-模式) [#9876](https://github.com/pingcap/tiflow/issues/9876) @[asddongmen](https://github.com/asddongmen)
- [`sql-mode`](/ticdc/ticdc-changefeed-config.md):你可以设置 TiCDC 同步数据时解析 DDL 语句所使用的 [SQL 模式](https://docs.pingcap.com/zh/tidb/v7.1/ticdc-ddl#sql-模式) [#9876](https://github.com/pingcap/tiflow/issues/9876) @[asddongmen](https://github.com/asddongmen)
- [`encoding-worker-num`](/ticdc/ticdc-changefeed-config.md)[`flush-worker-num`](/ticdc/ticdc-changefeed-config.md):你可以根据不同的机器规格,设置 redo 模块不同的并发参数 [#10048](https://github.com/pingcap/tiflow/issues/10048) @[CharlesCheung96](https://github.com/CharlesCheung96)
- [`compression`](/ticdc/ticdc-changefeed-config.md):你可以设置 redo log 文件的压缩行为 [#10176](https://github.com/pingcap/tiflow/issues/10176) @[sdojjy](https://github.com/sdojjy)
- [`sink.cloud-storage-config`](/ticdc/ticdc-changefeed-config.md):你可以设置同步数据到对象存储时自动清理历史数据的功能 [#10109](https://github.com/pingcap/tiflow/issues/10109) @[CharlesCheung96](https://github.com/CharlesCheung96)
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1 change: 1 addition & 0 deletions releases/release-7.5.0.md
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Expand Up @@ -172,6 +172,7 @@ TiDB 7.5.0 为长期支持版本 (Long-Term Support Release, LTS)。
| 配置文件 | 配置项 | 修改类型 | 描述 |
| -------- | -------- | -------- | -------- |
| TiDB | [`tikv-client.copr-req-timeout`](/tidb-configuration-file.md#copr-req-timeout-从-v750-版本开始引入) | 新增 | 设置单个 Coprocessor request 的超时时间。|
| TiKV | [`raftstore.inspect-interval`](/tikv-configuration-file.md#inspect-interval) | 修改 | 经过算法调优后,默认值由 `500ms` 调整为 `100ms`,以提升慢节点检测的灵敏度。|
| TiKV | [`raftstore.region-compact-min-redundant-rows`](/tikv-configuration-file.md#region-compact-min-redundant-rows-从-v710-版本开始引入) | 修改 | 触发 RocksDB compaction 需要的冗余的 MVCC 数据行数。从 v7.5.0 开始,该配置项对 `"raft-kv"` 存储引擎生效。|
| TiKV | [`raftstore.region-compact-redundant-rows-percent`](/tikv-configuration-file.md#region-compact-redundant-rows-percent-从-v710-版本开始引入) | 修改 | 触发 RocksDB compaction 需要的冗余的 MVCC 数据行所占比例。从 v7.5.0 开始,该配置项对 `"raft-kv"` 存储引擎生效。 |
| TiKV | [`raftstore.evict-cache-on-memory-ratio`](/tikv-configuration-file.md#evict-cache-on-memory-ratio-从-v750-版本开始引入) | 新增 | 当 TiKV 的内存使用超过系统可用内存的 90%,并且 Raft 缓存条目占用的内存超过已使用内存的 `evict-cache-on-memory-ratio` 比例时,TiKV 会逐出 Raft 缓存条目。 |
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