title | category | aliases | summary | |
---|---|---|---|---|
CLUSTER_CONFIG |
reference |
|
了解 TiDB 集群配置表 `CLUSTER_CONFIG`。 |
集群配置表 CLUSTER_CONFIG
用于获取集群当前所有 TiDB/PD/TiKV 实例的配置。对于 TiDB 4.0 以前的版本,用户需要逐个访问各个实例的 HTTP API 才能收集到所有组件配置。
{{< copyable "sql" >}}
desc information_schema.cluster_config;
+----------+--------------+------+------+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+----------+--------------+------+------+---------+-------+
| TYPE | varchar(64) | YES | | NULL | |
| INSTANCE | varchar(64) | YES | | NULL | |
| KEY | varchar(256) | YES | | NULL | |
| VALUE | varchar(128) | YES | | NULL | |
+----------+--------------+------+------+---------+-------+
字段解释:
TYPE
:节点的类型,可取值为tidb
,pd
和tikv
。INSTANCE
:节点的服务地址。KEY
:配置项名。VALUE
:配置项值。
以下示例查询 TiKV 实例的 coprocessor
相关配置:
{{< copyable "sql" >}}
select * from information_schema.cluster_config where type='tikv' and `key` like 'coprocessor%';
+------+-----------------+-----------------------------------+----------+
| TYPE | INSTANCE | KEY | VALUE |
+------+-----------------+-----------------------------------+----------+
| tikv | 127.0.0.1:20160 | coprocessor.batch-split-limit | 10 |
| tikv | 127.0.0.1:20160 | coprocessor.region-max-keys | 1.44e+06 |
| tikv | 127.0.0.1:20160 | coprocessor.region-max-size | 144MiB |
| tikv | 127.0.0.1:20160 | coprocessor.region-split-keys | 960000 |
| tikv | 127.0.0.1:20160 | coprocessor.region-split-size | 96MiB |
| tikv | 127.0.0.1:20160 | coprocessor.split-region-on-table | false |
+------+-----------------+-----------------------------------+----------+