Application Scenarios
RDS for MySQL supports automatic performance scaling. When the CPU usage of the instance reaches a certain threshold, the background initiates automatic performance scaling in the maintainable time period set by you.
Note: You need to set a maintainable time period to trigger automatic performance scaling. Make sure that your service supports reconnection because the scaling will cause service interruption.
Constraints and Restrictions
1. The automatic scaling will not be performed when the instance status is not Running.
2. The instance can be automatically scaled up to the maximum specification that the interface can query. (Automatic scaling is not supported if the instance capacity has already reached to upper limit).
3. Your account has a sufficient balance.
4. After scaling up, the instance cannot be scaled down.
5. As an independent instance, the automatic performance scaling needs to be set up for the read-only instance separately.
6. Automatic scaling is triggered on any node of the instance upon reaching the predefined threshold, which can be upgraded during the maintainable time period.
7. At present, only the high-availability version (one-master-and-one-slave) instances support automatic performance scaling.
8. By default, the specification is upgraded by doubling each time until the maximum specification is reached. For example (2C4G > 4C8G).
9. The Automatic Performance Scaling function is disabled by default, which needs to be enabled manually.
Procedure
1.In the upper right corner of the homepage of eSurfing Cloud official website, select Console and log in to the Console interface.
2.In the upper left corner of the Product Overview page of the Console, click Console and select Region.
3.Select Database > Relational database... Go to the MySQL Console.
4.On the Instance Management page, click the name of the target instance, go to the Basic Info page, and click Settings under Automatic Performance Scaling in the Configuration Information column.
5.Select CPU Scaling Trigger Threshold, Upper Limit of Specification Scaling, and Observation Window to enable automatic scaling, and click OK to enable automatic performance scaling.
² Note
The observation window is used to count whether the average CPU usage within the observation window of the instance exceeds the threshold.