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Maximum capacity specifications for SQL Server – SQL Server | Microsoft Docs – Surface devices
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Setting a fixed amount of memory for SQL Server
They represent the maximum compute capacity that a single instance will use. They do not constrain the server where the instance may be deployed. The following table specifies the compute capacity limits for a single instance of each edition of SQL Server:. This licensing is not available for new agreements. There are no limits under the Core-based Server Licensing model.
In a virtualized environment, the compute capacity limit is based on the number of logical processors, not cores. The reason is that the processor architecture is not visible to the guest applications. For example, a server that has four sockets populated with quad-core processors and the ability to enable two hyperthreads per core contains 32 logical processors with hyperthreading enabled.
But it contains only 16 logical processors with hyperthreading disabled. These logical processors can be mapped to virtual machines on the server. The virtual machines’ compute load on that logical processor is mapped to a thread of execution on the physical processor in the host server.
You might want to disable hyperthreading when the performance for each virtual processor is important. But it’s typically a server-scoped operation that will affect all workloads running on the server. This might suggest separating workloads that will run in virtualized environments from workloads that would benefit from the hyperthreading performance boost in a physical operating system environment.
Did you know that you can edit SQL content yourself? If you do so, not only do you help improve our documentation, but you also get credited as a contributor to the page. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Table of contents Exit focus mode. Table of contents. Important To elaborate further: A virtual machine VM has one or more virtual processors. One or more virtual processors are allocated to exactly one virtual machine.
Zero or one virtual processor is mapped to zero or more logical processors. When the mapping of virtual processors to logical processors is: One to zero, it represents an unbound logical processor not used by the guest operating systems.
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Compute capacity limits by edition of SQL Server – SQL Server | Microsoft Docs.Min and Max memory configurations in SQL Server Database instances
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