Database Autonomy Service:Prediction-based auto scaling

Option 1: Create a policy from the Management and Settings page

1. Log on to the DAS console.

2. In the left-side navigation pane, choose Resources > Auto Scaling Settings.

3. In the Auto Scaling Policies section, click Add Policy.

4. In the Add Policy panel, configure the following parameters.

   Parameter	Description
   Policy Name	A name for the policy
   Mode	Select Prediction-based Auto Scaling
   Engine Type	The database engine type
   Metric Type	The metric to predict. For RDS MySQL or PolarDB MySQL, only CPU Utilization (%) is available. For Redis (Tair), only Memory Usage (%) is available.
   Destination Value	The threshold. DAS provides a scaling suggestion when the predicted value is greater than or equal to this value.

5. Click Next Step. In the Apply Policies dialog box, select the database instances to apply the policy to, then click the icon.

6. Click Confirm.

To apply the policy to additional instances later, find the policy in the Auto Scaling Policies section, click Apply in the Actions column, select the instances, and click Confirm.

Option 2: Create a policy from the instance details page

Use this option when you want to configure a policy, alerts, and contact groups for a specific instance in one place.

1. Log on to the DAS console.

2. In the left-side navigation pane, choose Intelligent O&M Center > Instance Monitoring.

3. Find the instance and click its ID.

4. On the instance details page, click Autonomy Service Settings in the upper-right corner.

5. On the Autonomous Function Settings tab of the Autonomous Function Management panel, click the Auto Scaling tab.

6. In the Applied Policies section, click Add Policy and configure the policy parameters. For parameter descriptions, see the "Table 1. Parameters" section of the Automatic scaling for local resources topic.

7. In the Recommended Policies section, find the policy you created and click Apply in the Actions column.

8. Click OK.

9. In the Alert Configuration section, configure an alert template to receive notifications when a scaling suggestion is triggered. DAS recommends an alert template with the required alert rules pre-added. Follow the prompts to complete the configuration.

   If your instance already has an alert template, add the required autonomy event alert rules to that template. For details, see Configure alert templates. To add specific alert rules, see Configure alert rules.

10. In the Select Contact Group section, select an alert contact group. For details, see Manage alert contacts.

    • Click Add Contact to add an alert contact.

    • Click Create Contact Group to create a new contact group.

    • To edit or delete a contact, click Edit or Remove in the Actions column.

11. Click Submit Configuration and confirm in the dialog box.

To modify a policy, click Modify in the Actions column and update the settings in the Update Policy panel.

To stop applying a policy to an instance, click Cancel in the Actions column under the Applied Policies section.