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Merge pull request #16976 from MicrosoftDocs/stevestein-patch-1
Reposition note for clarity
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docs/relational-databases/thread-and-task-architecture-guide.md

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@@ -171,12 +171,13 @@ Microsoft Windows uses a numeric priority system that ranges from 1 through 31 t
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By default, each instance of [!INCLUDE[ssNoVersion](../includes/ssnoversion-md.md)] is a priority of 7, which is referred to as the normal priority. This default gives [!INCLUDE[ssNoVersion](../includes/ssnoversion-md.md)] threads a high enough priority to obtain sufficient CPU resources without adversely affecting other applications.
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> [!IMPORTANT]
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> [!INCLUDE[ssNoteDepFutureDontUse](../includes/ssnotedepfuturedontuse-md.md)]
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The [priority boost](../database-engine/configure-windows/configure-the-priority-boost-server-configuration-option.md) configuration option can be used to increase the priority of the threads from an instance of [!INCLUDE[ssNoVersion](../includes/ssnoversion-md.md)] to 13. This is referred to as high priority. This setting gives [!INCLUDE[ssNoVersion](../includes/ssnoversion-md.md)] threads a higher priority than most other applications. Thus, [!INCLUDE[ssNoVersion](../includes/ssnoversion-md.md)] threads will generally be dispatched whenever they are ready to run and will not be preempted by threads from other applications. This can improve performance when a server is running only instances of [!INCLUDE[ssNoVersion](../includes/ssnoversion-md.md)] and no other applications. However, if a memory-intensive operation occurs in [!INCLUDE[ssNoVersion](../includes/ssnoversion-md.md)], however, other applications are not likely to have a high-enough priority to preempt the [!INCLUDE[ssNoVersion](../includes/ssnoversion-md.md)] thread.
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If you are running multiple instances of [!INCLUDE[ssNoVersion](../includes/ssnoversion-md.md)] on a computer, and turn on priority boost for only some of the instances, the performance of any instances running at normal priority can be adversely affected. Also, the performance of other applications and components on the server can decline if priority boost is turned on. Therefore, it should only be used under tightly controlled conditions.
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> [!IMPORTANT]
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> [!INCLUDE[ssNoteDepFutureDontUse](../includes/ssnotedepfuturedontuse-md.md)]
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## Hot add CPU
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Hot add CPU is the ability to dynamically add CPUs to a running system. Adding CPUs can occur physically by adding new hardware, logically by online hardware partitioning, or virtually through a virtualization layer. Starting with [!INCLUDE[ssKatmai](../includes/ssKatmai-md.md)], [!INCLUDE[ssNoVersion](../includes/ssnoversion-md.md)] supports hot add CPU.

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