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Creating a Parameter Template
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The parameter template for TencentDB for MongoDB is a predefined set of parameters designed to meet specific database configuration needs. Each database version has a pre-configured default parameter template to accommodate general business requirements. Additionally, users can customize parameter templates according to specific use case needs, allowing for more efficient use of database services.
Note:
The current parameter template feature is controlled by an allowlist. If a request is needed, you can submit a ticket to apply for use of this feature.
Using System Default Parameter Templates
1. Log in to the MongoDB Console.
2. In the left sidebar, select Parameter Template.
3. On the parameter template page, select Default Template. For each database version, TencentDB for MongoDB provides a corresponding default parameter template.
4. Click View Details in the Operations column to view the specific parameter configuration information for the template.
5. Click Application Instances in the Operations column to apply the default parameter template to specific instances. As shown below, select the Region, then choose one or more instances within the region, select the Execution Method, and click Submit to apply the default parameter template to the selected instances.
Creating a Custom Parameter Template
1. Log in to the MongoDB Console.
2. In the left sidebar, select Parameter Template.
3. On the parameter template page, click Create Template.
4. In the pop-up Create Parameter Template window, configure the following parameters, then click Create and Set Parameters.
Template Name: Enter the name of the parameter template. The template name should be unique.
Database Version: Select the required database version.
Architecture Type: Select the architecture type for the database instance.
Template Description: Enter a brief description of the parameter template.
5. The parameter list for the template will be displayed. Click Batch Modify Parameters, as shown in the image below, and modify the parameter values in the Current Parameter Value column based on the range of values allowed in the Modifiable Parameter Values. For the meaning of each parameter, see Adjust Database Parameters.
6. After the modifications are complete, click Confirm Modification to finalize the creation of the parameter template.
7. (Optional) Return to the parameter list and click Apply to Instance to apply the template to one or more specific instances.
8. (Optional) Return to the parameter list and click Save as Template. In the Save as Parameter Template pop-up window, enter a new template name and description, and click Save to save the current template as a new one.
Applying Parameter Template to Instance
Note:
Database instances that have used a parameter template will not automatically synchronize with updates to the template. You need to manually reconfigure the instances by applying the updated parameter template again.
1. Log in to the MongoDB Console.
2. In the left sidebar, select Parameter Template.
3. From the parameter template list on the right, select the template you wish to apply, and click Apply to Instance in the Action column.
4. On the Apply to Instance page, select the Execution Method, then choose the Region where the instance belongs. In the Selectable Instances under MongoDB instance, select one or more instances.
5. Click Submit. If the Execution Method is set to Execute Immediately, the parameter values in the template will be applied to the selected instances immediately. If the Execution Method is set to Within Maintenance Time, you will need to wait for the task to be completed during the maintenance window before the parameter values in the template are applied to the selected instances.
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