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          Relational Database Service

          Instructions for Billing of Configuration Change

          Configuration change description

          The user can change the instance configuration as needed, and the detailed configuration changing and billing are as follows:

          Billing Mode Configuration Change Rule Billing Description
          Prepaid - annual and monthly packages Support configuration upgrading, but configuration downgrading is not supported.
          Take one day as the minimum billing unit. Less than one day is counted as one day.
          Prepayment discount for configuration changing instance is contingent upon the remaining time length (one year full, two years full, or three years full).
          Sum paid for upgrading =(remaining days of the contract /total days of the contract)∗(new instance sum -original instance sum );
          for example, MySQL purchases 2 cores, 8G memory and 500G disk in monthly package, and there are 30 days in current month. If the usage period lasts for 9.5 days and the instance is upgraded to 4 cores, 16G memory, and 800G disk, the sum to be paid is: (30-10)/30∗(2308-1230)=CNY 718.67.
          Postpaid - Pay by time Support both configuration upgrading and downgrading.
          Take one minute as the minimum billing unit. Less than one minute is counted as one minute.
          Sum paid for upgrading = New instance sum.

          For the detailed operation of a configuration change, see Instance Configuration Change.

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