An OCPU(OCPU = Oracle Compute Unit) is defined as the CPU capacity equivalent of one physical core of an Intel Xeon processor with hyper threading enabled or one physical core of an Oracle SPARC processor. For Intel Xeon processor, each OCPU corresponds to two hardware execution threads, known as vCPUs. For Oracle SPARC processors, one OCPU corresponds to eight hardware execution threads, also known as vCPUs.
When creating a database deployment on Oracle Database Cloud Service, you choose the computing power for the associated compute node (or compute nodes in the case of deployments that use Oracle Real Application Clusters) from a list of supported Oracle CPU (OCPU) and processor RAM combinations. A shape is a resource profile that specifies the number of OCPUs and the amount of memory to be allocated to an instance in Oracle Compute Cloud Service.
If you’re not sure on which shape to choose, you should use your current On-Premises hardware setup as reference.
Oracle Compute Cloud Service enables you to select from a range of predefined shapes that determine the number of CPUs, amount of RAM, and local storage available in an instance. Several predefined shapes are available for both bare metal and virtual machine instances. While creating compute instances, you can assign CPU and memory resources by selecting from a wide range of resource profiles (called shapes), each of which is a carefully designed combination of processor and memory limits.
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