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Splitting a Reserved Instance

Last updated: 2022-05-19 16:52:28


    You can split a reserved instance into multiple reserved instances with smaller normalization factors, and apply them to smaller on-demand instances.

    Rules and Limits

    ● 1C1G, 1C2G, and 2C4G reserved instances cannot be split.
    ● You can change the instance size, but not the instance type.
    ● The region and availability zone cannot be changed.
    ● The sum of normalization factors cannot be changed.
    ● Make sure the CPU:MEM ratio is the same before splitting;
    ● One reserved instance can be split into a maximum of 100 reserved instances.


    1. Log in to the CVM console;
    2. Click Reserved Instances in the left sidebar;
    3. On the Reserved Instances page, find the original reserved instance and click Split under the Operation column;
    4. In the pop-up window, configure the name, CPU, memory and quantity of new reserved instances.

    Execution Result

    After splitting, the original reserved instance goes to the Expired status, while the new reserved instances are in Activated status.


    Normalization factor: It indicates the CPU performance of a For the splitting and merging of reserved instances, the normalization factor is calculated based on the number of vCPUs.
    Sum of normalization factor = Normalization factor of the instance size × Instance quantity. The sum of normalization factors must keep the same as the one before splitting.

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