SHOW-CONFIG

Name

SHOW CONFIG

Description

This statement is used to display the configuration of the current cluster.

grammar:

SHOW (FRONTEND|BACKEND)  CONFIG [LIKE "pattern"];

The columns in the results of showing FE configuration have the following meanings:

1. Key: Configuration item name
2. Value: Configuration item value
3. Type: Configuration item type
4. IsMutable: Whether it can be set by ADMIN SET CONFIG command
5. MasterOnly: Is it only applicable to Master FE
6. Comment: Configuration item description

The columns in the results of showing BE configuration have the following meanings:

1. BackendId: ID of a backend
2. Host: Host of a backend
3. Key: Configuration item name
4. Value: Configuration item value
5. Type: Configuration item type
6. IsMutable: Whether it can be modified

Example

1. View the configuration of the current FE node

   SHOW FRONTEND CONFIG;

2. Use the like predicate to search the configuration of the current Fe node

   mysql> SHOW FRONTEND CONFIG LIKE '%check_java_version%';
   +--------------------+-------+---------+---------- -+------------+---------+
   | Key | Value | Type | IsMutable | MasterOnly | Comment |
   +--------------------+-------+---------+---------- -+------------+---------+
   | check_java_version | true | boolean | false | false | |
   +--------------------+-------+---------+---------- -+------------+---------+
   1 row in set (0.01 sec)

3. View the configuration for a specific BE using the backend ID 10001

   SHOW BACKEND CONFIG FROM 10001;

4. View the configuration useing both a pattern and a backend ID

   mysql> SHOW BACKEND CONFIG LIKE "be_port" FROM 10001;
   +-----------+---------------+---------+-------+---------+-----------+
   | BackendId | Host          | Key     | Value | Type    | IsMutable |
   +-----------+---------------+---------+-------+---------+-----------+
   | 10001     | xx.xx.xxx.xxx | be_port | 9060  | int32_t | false     |
   +-----------+---------------+---------+-------+---------+-----------+

Keywords

SHOW, CONFIG

Best Practice