You can modify parameters in custom parameter templates as needed to get the most out of DDS performance.
You can modify parameters in either of the following ways:
- Directly modify the parameters of a specified instance.
If you change a dynamic parameter value in a parameter template and save the change, the change takes effect immediately regardless of the Effective upon Reboot setting. If you modify static parameters on the Parameters page of an instance and save the modifications, the modifications take effect only after you manually restart the target instance.
- Modify the parameters in a parameter template and apply the template to the instance.
The changes only take effect after you apply the template to the instance. If you modify static parameters in a custom parameter template on the Parameter Template Management page and save the modifications, the modifications take effect only after you apply the parameter template to instances and manually restart the instances. For details about how to apply a parameter template to instances, see Applying a Parameter Template.
Precautions
- You can change parameter values in custom parameter templates but cannot change the default parameter templates provided by the system. You can only click the name of a default parameter template to view its details.
- If a custom parameter template is set incorrectly, the instance associated with the template may fail to start. You can re-configure the custom parameter template according to the configurations of the default parameter template.
Modifying Parameters of an Instance
- Log in to the management console.
- Click
in the upper left corner and select a region and a project. - Click Service List. Under Database, click Document Database Service to go to the DDS console.
- In the navigation pane on the left, choose Instances. On the displayed page, click the DB instance whose parameters you wish to modify.
- In the navigation pane on the left, choose Parameters. On the displayed page, modify parameters as required.
- After the parameters have been modified, click Change History to view parameter modification details. For details, see Viewing Change History of DB Instance Parameters.Notice
Check the value in the Effective upon Restart column. If it is set to:
- Yes: If an instance status on the Instances page is Pending restart, the instance needs to be restarted to apply changes.
- No: The changes are applied immediately.
Modifying Parameters in a Custom Parameter Template
- Log in to the management console.
- Click in the upper left corner and select a region and a project.
- Click Service List. Under Database, click Document Database Service to go to the DDS console.
- In the navigation pane on the left, choose Parameter Templates.
- On the Parameter Templates page, locate the target parameter template and click its name.
- Modify the required parameters.
- 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.
- The modifications take effect only after you apply the parameter template to instances. For details, see Applying a Parameter Template.Notice
- After the parameters have been modified, click Change History to view parameter modification details. For details, see Viewing Change History of a Custom Parameter Template.
- The change history page displays only the modifications of the last seven days.
- For details about the parameter template statuses, see Parameter Template Status.
- After modifying a parameter, view the associated instance status in the instance list. If Pending restart is displayed, restart the instance for the modification to take effect.