Modifying Parameters of GeminiDB Cassandra Instances

Precautions

• Note that parameter values in default parameter templates cannot be changed.
• Though parameter values in a default template cannot be changed, you can view details about a default parameter template.
• If a custom parameter template is set incorrectly, the database startup may fail. You can re-configure the custom parameter template according to the configurations of the default parameter template.

Exercise caution when modifying parameter values to prevent exceptions.

Modifying a Custom Parameter Template and Applying It to an Instance

1. Log in to the GeminiDB console.
2. In the service list, choose Databases > GeminiDB Cassandra API.
3. In the navigation pane on the left, choose Parameter Templates.
4. Click the Custom Templates tab, locate the parameter template you want to modify, and click its name.
5. Change parameter values as required.
   Figure 1 Modifying parameters in a parameter template
   
   • To save the modifications, click Save.
   • To cancel the modifications, click Cancel.
   • To preview the modifications, click Preview.
     Figure 2 Previewing changes
     

     

6. After parameters are modified, click Change History to view parameter modification details.
   For details about how to view parameter modification details, see Viewing Parameter Change History.

   

   • The modifications take effect only after you apply the parameter template to DB instances. For details, see Applying a Parameter Template.
   • The change history page displays only the modifications of the last seven days.

Modifying Parameters of an Instance

1. Log in to the GeminiDB console.
2. In the service list, choose Databases > GeminiDB Cassandra API.
3. In the navigation pane on the left, choose Instances. On the displayed page, locate the instance whose parameters you want to modify and click its name.
4. In the navigation pane on the left, choose Parameters. On the displayed page, modify parameters as required.
   Figure 3 Parameters
   
   • To save the modifications, click Save.
   • To cancel the modifications, click Cancel.
   • To preview the modifications, click Preview.

5. After parameters are modified, click Change History to view parameter modification details.
   For details about how to view parameter modification details, see Viewing Parameter Change History.

   

   After you modify instance parameters, the modifications immediately take effect for the instance.

   Check the value in the Effective upon Restart column.

   • If the value is Yes and the DB instance status is Pending restart, restart the instance for the modifications to take effect.
   • If the value is No, the modifications take effect immediately.