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Editing a Parameter Group

Scenarios

This section describes how to edit parameters in the parameter groups that you have created to meet your service requirements and achieve optimal performance.

Default parameter groups are unchangeable. You can only view them by clicking their names. If inappropriate settings of customized parameter groups lead to a database startup failure, you can reset the customized parameter group by referring to the settings of the default parameter group.

Procedure

  1. Log in to the DDS console.
  2. In the navigation pane on the left, click Parameter Group Management.
  3. On the Parameter Group Management page, locate and click the target parameter group.
  4. Modify the required parameters.

    Related parameters are described as follows:

    • For details on parameter descriptions, visit MongoDB official website.
    • The default value of the net.maxIncomingConnections parameter varies according to DB instance specifications. Therefore, this parameter is set to default before being specified.
    • disableJavaScriptJIT and security.javascriptEnabled are used together to set the statistical function.
      • disableJavaScriptJIT: The default value is true, indicating that the JavaScriptJIT compiler is disabled.
      • security.javascriptEnabled: The default value is false, indicating that JavaScript cannot be executed on mongod and the mapReduce and group commands cannot be used.

    Possible operations are as follows:

    • If you want to save the modifications, click Save.
    • If you want to cancel the modifications, click Cancel.
    • If you want to preview the modifications, click Preview.

    For details on the description of parameter group status, see Parameter Group Status.

    After modifying a parameter, you need to view the associated instance status in the instance list. If Pending restart is displayed, you need to restart the instance for the modification to take effect.

Parent topic: Parameter Group Settings