For a PolarDB cluster you subscribed to, you can temporarily upgrade the specifications of the cluster to meet the business peak requirements in the specified validity period of the temporary upgrade.
Prerequisites
- The cluster is subscription-based.
- No pending orders of renewal or specification changes are available for the cluster.
- No pending orders of temporary upgrades are available for the cluser.
- The product edition must be Cluster Edition. Both Single Node and Archive Database do not support this feature. For more information about the three editions, see Overview.
Background information
A temporary upgrade allows you to temporarily upgrade the specifications of a PolarDB cluster to improve overall performance. When the specified restoration time is reached, the specifications of the cluster are automatically restored to the status before the temporary upgrade.
Considerations
- Transient connection errors may occur during the restoration process. Therefore, you must ensure that your application implements an automatic reconnection mechanism.
- The restoration time must be at least one day earlier than the expiration time of the cluster. For example, if a cluster expires on January 10, the restoration time must be on January 9 at latest.
- Regular methods of changing specifications are not supported during the temporary upgrade. For more information, see Manually upgrade or downgrade a PolarDB cluster.
- The minimum validity period for a temporary upgrade is one hour. We recommend that you set the validity period to up to 14 days.
- After you perform a temporary upgrade on a cluster, the cluster performance may not meet the business requirements or you may need to extend the restoration time. In this case, you can perform a maximum of one more temporary upgrade before the restoration time is reached. The restoration time that you specify for the second temporary upgrade cannot be earlier than the previous one.
Pricing
The price of a temporary upgrade is 1.5 times the price difference between the original and new specifications. Assume that the validity period of the temporary upgrade is N days. You can calculate the price based on the following formula:
Price = (Monthly subscription fee for the new specifications - Monthly subscription fee for the original specifications)/30 × 1.5 × N