Configuration change

If a Standard Instance is over- or under-provisioned for your workload, you can resize it by changing the number and size of compute nodes.

Rules

Click Resize on the instance page to start. When the resize starts, the system generates a new bill: the cash portion of the previous bill is deducted first; if there is a refund, the remainder is returned to your account balance. Coupons that have already been used are not refundable. After you submit, the instance shows a “Resizing” badge — typically a few minutes to complete.

Billing

For pay-as-you-go (post-pay) instances there is no refund or extra payment on resize: the next hour’s charge is calculated by the second based on when the resize happened. The rest of this section explains billing for resizes on subscription (annual / monthly) instances.

The billing rules cover these cases:

Case	Billing rule
Increase node spec only / increase node count only / increase both	Top-up = (new monthly list price - old monthly list price) / 30 / 24 × remaining subscription time
Decrease node spec only / decrease node count only / decrease both	Cash actually paid for the instance > amount already consumed: refund = (cash actually paid - amount already consumed) × old/new spec ratio Cash actually paid for the instance ≤ amount already consumed (i.e. coupons covered part of it): refund = 0 Old/new spec ratio = (old list price - new list price) / old list price
Increase node spec and decrease node count	Compute the top-up using rule 1, compute the refund using rule 2, and net the two to get the final amount.
Decrease node spec and increase node count	Compute the refund using rule 2, compute the top-up using rule 1, and net the two to get the final amount.

For the meaning of “amount already consumed” and the surcharge factor, see the refund-amount calculation in the Cancellation policy.