How to upgrade or downgrade a Hologres instance - Hologres

You can upgrade or downgrade the compute and storage resources of your Hologres instance based on your business needs. This helps you align resource allocation with current demands and improve resource utilization. This topic describes how to upgrade or downgrade a Hologres instance.

Prerequisites

Your Alibaba Cloud account has no unpaid orders or overdue payments. You can check this on the User Center page.
The instance is in the Normal state. To check the status of your Hologres instance, see Instance list.

Notes

Storage resource upgrades or downgrades
- For pay-as-you-go instances, you do not need to upgrade or downgrade storage resources. Storage is billed based on your actual usage.
- For subscription instances, upgrading or downgrading storage resources involves adjusting the storage quota for your subscription. This operation does not affect the normal use of the instance. You can continue to query and write data during the process.
Compute resource upgrades or downgrades
- For general-purpose instances, the service is unavailable during compute resource upgrades or downgrades. Perform these operations during off-peak hours and ensure that your application has a reconnection mechanism. The process involves reallocating compute resources and updating metadata, and typically takes 2 to 5 minutes.
- For compute group instances:
  - Upgrading or downgrading the reserved compute resources for compute groups does not affect the normal usage of individual compute groups.
  - Upgrading or downgrading the number of Gateway nodes causes a transient disconnection for all compute groups. You must reconnect after the change is complete.
  - For more information about the impacts of adjusting the configuration of a single compute group, see Compute group management.
- Subscription and pay-as-you-go instances perform identically.

Billing information

For more information about the billing of Hologres instances, see Billing overview.

Upgrade (scale-out)

Log on to the Hologres Management Console and in the navigation pane on the left, click Instances.
On the Instances page, click the instance name.
On the Instance Details page, click Upgrade.
In the upgrade confirmation dialog box, click Upgrade.

You cannot perform any operations on the instance during the upgrade. We recommend that you perform this operation during off-peak hours and ensure that your application has a reconnection mechanism. The upgrade process involves reallocating compute resources and updating metadata, and typically takes 2 to 5 minutes.
On the Upgrade/Downgrade page, select the Computing Resources specification and set the Storage Resources quota.

Note
Only subscription instances support setting a storage resource quota.
Select Service Agreement and click Buy Now.

Downgrade (scale-in)

Log on to the Hologres Management Console and in the navigation pane on the left, click Instances.
On the Instances page, click the instance name.
On the Instance Details page, click Downgrade.
In the downgrade confirmation dialog box, click Downgrade.

You cannot perform any operations on the instance during the downgrade. We recommend that you perform this operation during off-peak hours and ensure that your application has a reconnection mechanism. The downgrade process involves reallocating compute resources and updating metadata, and typically takes 2 to 5 minutes.
On the Downgrade page, select the Computing Resources specification and set the Storage Resources quota.

Note
Only subscription instances support setting a storage resource quota.
Select Service Agreement and click Buy Now.