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A new Setup warning in SQL 22 CU15
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dimitri-furman committed Nov 8, 2024
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Expand Up @@ -4,7 +4,7 @@ description: This article discusses compute capacity limits for SQL Server 2019
author: MikeRayMSFT
ms.author: mikeray
ms.reviewer: randolphwest, derekw
ms.date: 07/30/2024
ms.date: 11/08/2024
ms.service: sql
ms.subservice: release-landing
ms.topic: conceptual
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## Limit number of logical cores per NUMA node to 64

You can experience issues such as stack dumps on servers with more than 64 logical processors per NUMA node. A BIOS or firmware configuration can reduce the logical core count to a maximum of 64 logical processors per NUMA node, presented to the operating system.
You can experience issues such as stack dumps on servers with more than 64 logical processors per NUMA node. A BIOS or firmware configuration can reduce the logical core count presented to the operating system to a maximum of 64 logical processors per NUMA node.

> [!CAUTION]
> [!INCLUDE [sssql22-md](../includes/sssql22-md.md)] Cumulative Update 11 introduced a breaking change, where the [!INCLUDE [ssde-md](../includes/ssde-md.md)] doesn't start if it detects more than 64 logical cores per NUMA node.
>
> Starting from [!INCLUDE [sssql22-md](../includes/sssql22-md.md)] Cumulative Update 15, Setup produces a warning that this configuration is unsupported and will result in the [!INCLUDE [ssde-md](../includes/ssde-md.md)] service being stopped and disabled. The warning is also included in Setup logs.
You can reduce the logical core count per NUMA node in an [Azure Virtual Machine](#disable-smt-in-an-azure-virtual-machine), by disabling SMT. For [bare-metal](#reduce-logical-core-count-on-bare-metal-instances) [!INCLUDE [ssnoversion-md](../includes/ssnoversion-md.md)] instances, you can reduce the logical core count with sub-NUMA clustering (SNC) or Nodes per Socket (NPS) options.

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