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Besides the system parameter templates provided by TencentDB for MySQL, you can create custom parameter templates in order to configure parameters in batches.

You can use the parameter template to configure and manage the parameters of a database engine. A template is like a container of the values of database engine parameters, which can be applied to one or more TencentDB instances.
You can log in to the TencentDB for MySQL console and click Parameter Templates on the left sidebar to create, view, and manage parameter templates which support the following features:

• Support default parameter templates.
• Create templates by modifying the default parameters to generate custom parameter optimization schemes.
• Import the MySQL configuration file my.conf to generate templates.
• Save parameter configurations as templates.
• Import parameters from templates to apply to one or more instances.

  Note：

  If the parameters in the template are updated, the instance parameters are not updated unless they are manually re-applied to the instances.
  You can apply the parameter changes to single or multiple instances by importing a template.

Creating a Parameter Template

You can create a parameter template, modify the parameter values, and apply the template to instances.

1. Log in to the TencentDB for MySQL console, select Parameter Templates on the left sidebar, and click Create Template.
   
2. In the pop-up dialog box, specify the following configurations, and click Create and Set Parameters.

• Template Name: enter a unique template name.
• Database Version: select a database version.
• Template Description: enter a brief description of the parameter template.
  

3. After the creation is completed, you can modify, import, and export parameters on the template details page.

Applying a Parameter Template to Instances

1. Log in to the TencentDB for MySQL console and select Parameter Templates on the left sidebar.
2. In the parameter template list, locate the desired template and click Apply to Instance in the Operation column.
   
3. On the displayed page, specify the execution mode and instances, make sure that all parameter values are correct, and click Submit.

• Execution Mode: Immediate execution is selected by default. If you select During maintenance window, the parameter modification task will be executed and take effect during the instance maintenance period.
• MySQL Instance: select one or more instances that need to apply the parameter template in the specified region.
• Parameter Comparison: view the changed parameter values of the selected instance.

  Note：

  Before applying a parameter template to multiple instances, please make sure the parameters can be applied to those instances.

  

4. (Optional) If a parameter modification or batch modification task has been submitted but you want to cancel it, you can select Task List on the left sidebar in the console, locate the task, and click Cancel in the Operation column. You can cancel a task only before it is executed. The task state should be "Waiting for execution".
   

Copying a Parameter Template

To include most of the custom parameters and values of an existing parameter template in a new template, you can copy the existing template.

Method 1. Copying an existing parameter template

1. Log in to the TencentDB for MySQL console, select Parameter Templates on the left sidebar, click the parameter template name or View Details in the Operation column in the template list, and enter the parameter template details page.
2. Select More > Save as Template at the top.
3. In the pop-up dialog box, specify the following configurations:

• Template Name: enter a unique template name.
• Template Description: enter a brief description of the parameter template.

4. After confirming that everything is correct, click Save.

Method 2. Saving parameters of an instance as a parameter template

1. Log in to the TencentDB for MySQL console, select Instance List on the left sidebar, and click an instance ID/name in the instance list to access the instance management page.
2. Select Database Management > Parameter Settings and click Save as Template.
3. In the pop-up dialog box, specify the following configurations:

• Template Name: enter a unique template name.
• Template Description: enter a brief description of the parameter template.

4. After confirming that everything is correct, click Create and Save.

Modifying Parameter Values in a Parameter Template

1. Log in to the TencentDB for MySQL console, select Parameter Templates on the left sidebar, click the parameter template name or View Details in the Operation column in the template list, and enter the parameter template details page.
2. Click Batch Modify Parameters or click in the Current Value column to modify the parameter value.

   Note：

   If you click Import Parameters, you need to upload a local parameter configuration file. To avoid importing failures, the configuration file should be in the same format as the configuration file of the MySQL database server, or you can use the file template of the exported parameters.

   

Importing a Parameter Template

1. Log in to the TencentDB for MySQL console, select Parameter Templates on the left sidebar, click the parameter template name or View Details in the Operation column in the template list, and enter the parameter template details page.
2. Click Import Parameters.

   Note：

   If you click Import Parameters, you need to upload a local parameter configuration file. To avoid importing failures, the configuration file should be in the same format as the configuration file of the MySQL database server, or you can use the file template of the exported parameters.

3. In the pop-up dialog box, select a file to upload and click Import and Overwrite Original Parameters.

Exporting a Parameter Template

Method 1

1. Log in to the TencentDB for MySQL console and select Parameter Templates on the left sidebar.
2. In the parameter template list, locate the desired template and click Export in the Operation column.

Method 2

1. Log in to the TencentDB for MySQL console, select Parameter Templates on the left sidebar, click the parameter template name or View Details in the Operation column in the template list, and enter the parameter template details page.
2. Select More > Export Parameters at the top.

Deleting a Parameter Template

If a parameter template is created redundantly or no longer needed, it can be easily deleted.

1. Log in to the TencentDB for MySQL console and select Parameter Templates on the left sidebar.
2. In the parameter template list, locate the desired template and click Delete in the Operation column.
3. Click OK in the pop-up dialog box.

See Also

For suggestions for configuration of key parameters, see Suggestions on Parameter Settings.